WO2022142459A1 - 信号传输方法及装置、终端、接入网设备 - Google Patents

信号传输方法及装置、终端、接入网设备 Download PDF

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Publication number
WO2022142459A1
WO2022142459A1 PCT/CN2021/117720 CN2021117720W WO2022142459A1 WO 2022142459 A1 WO2022142459 A1 WO 2022142459A1 CN 2021117720 W CN2021117720 W CN 2021117720W WO 2022142459 A1 WO2022142459 A1 WO 2022142459A1
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Prior art keywords
location information
access network
network device
target terminal
precoding
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PCT/CN2021/117720
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English (en)
French (fr)
Inventor
白伟
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大唐移动通信设备有限公司
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Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to US18/256,171 priority Critical patent/US20240063853A1/en
Priority to EP21913206.5A priority patent/EP4274111A4/en
Publication of WO2022142459A1 publication Critical patent/WO2022142459A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842Weighted combining
    • H04B7/0848Joint weighting
    • H04B7/0854Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion

Definitions

  • the present disclosure relates to the field of mobile communication technologies, and in particular, to a signal transmission method and device, a terminal, and an access network device.
  • a precoding (Precoding) strategy In a mobile communication system, in a multi-input multi-output (Multi-Input Multi-Output, MIMO) scenario, the complexity of a precoding (Precoding) strategy is high.
  • the access point Access Point, AP, that is, small base station
  • UE User Equipment
  • Information Channel State Information, CSI
  • CPU Central Processing Unit
  • fronthaul fronthaul
  • the CPU calculates the Precoding strategy, it feeds back its Precoding strategy to the AP; however, during the fronthaul process
  • the amount of interactive data and the amount of CPU computation are huge. Therefore, it is necessary to further reduce the complexity of the Precoding strategy.
  • the embodiments of the present disclosure provide a signal transmission method and apparatus, a terminal, and an access network device, so as to solve the problem of high complexity of the precoding strategy in the prior art.
  • an embodiment of the present disclosure provides a signal transmission method, the method comprising:
  • a precoding coefficient for performing precoding processing on the data sent to the target terminal is determined.
  • the method includes:
  • the acquiring the first location information of the second access network device includes:
  • the first location information includes coordinate information of the antenna of the second access network device.
  • the acquiring the second location information of the target terminal includes:
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • the determining, according to the first location information and the second location information, precoding coefficients for performing precoding processing on the data sent to the target terminal including:
  • the magnitude and phase shift of the precoding coefficients are determined according to the first distance; wherein, the magnitude is inversely proportional to the first distance; and the phase shift is the product of the wavenumber and the first distance.
  • an embodiment of the present disclosure provides a signal transmission method, the method comprising:
  • the precoding coefficient is the second access network device or the first access network device according to the second access network device
  • the first location information and the second location information of the target terminal are determined
  • Precoding processing is performed on the data sent to the target terminal according to the precoding coefficient.
  • the determining of the precoding coefficients used for precoding the data sent to the target terminal includes:
  • the acquiring the first location information of the second access network device includes:
  • the acquiring the second location information of the target terminal includes:
  • the determining the precoding coefficient according to the first location information and the second location information includes:
  • the method before the receiving the precoding coefficient sent by the first access network device, the method further includes:
  • the first location information includes coordinate information of the antenna of the second access network device.
  • the method further includes:
  • the first location information is sent to the target terminal.
  • an embodiment of the present disclosure further provides a signal transmission method, the method comprising:
  • the precoding coefficient is determined by the second access network device or the first access network device according to the first location information and the second location information.
  • the acquiring the first location information of the second access network device includes:
  • the first location information of the second access network device sent by the second access network device is received.
  • the acquiring the second location information of the target terminal includes:
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • the determining the first position information and the second position information, and determining the receiving array combining vector corresponding to the precoding coefficient includes:
  • a receiving array combining vector is determined.
  • the first data relationship is:
  • v n (t) represents the combined vector of the receiving array
  • I represents the identity matrix, represents the noise variance
  • s n, 1 (t) represents the received signal of the reference antenna of the target terminal
  • sn ,1 (t) [sn ,1,1 (t),...,sn ,1,k (t)...,sn ,1,K0 (t)] T ,k denotes The first sequence number of the second access network device, and the value range of k is 1 to K0; n represents the second sequence number of the target terminal;
  • an embodiment of the present disclosure further provides an access network device, where the access network device includes:
  • a memory for storing a computer program
  • a transceiver for sending and receiving data under the control of the processor
  • a processor for reading the computer program in the memory and performing the following operations:
  • a precoding coefficient for performing precoding processing on the data sent to the target terminal is determined.
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the first location information includes coordinate information of the antenna of the second access network device.
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the magnitude and phase shift of the precoding coefficients are determined according to the first distance; wherein, the magnitude is inversely proportional to the first distance; and the phase shift is the product of the wavenumber and the first distance.
  • an embodiment of the present disclosure further provides an access network device, where the access network device includes:
  • a memory for storing a computer program
  • a transceiver for sending and receiving data under the control of the processor
  • a processor for reading the computer program in the memory and performing the following operations:
  • the precoding coefficient is the second access network device or the first access network device according to the second access network device
  • the first location information and the second location information of the target terminal are determined
  • Precoding processing is performed on the data sent to the target terminal according to the precoding coefficient.
  • the processor is also used to read the computer program in the memory and perform the following operations:
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the first location information includes coordinate information of the antenna of the second access network device.
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the first location information is sent to the target terminal.
  • an embodiment of the present disclosure further provides a terminal, where the terminal includes:
  • a memory for storing a computer program
  • a transceiver for sending and receiving data under the control of the processor
  • a processor for reading the computer program in the memory and performing the following operations:
  • the precoding coefficient is determined by the second access network device or the first access network device according to the first location information and the second location information.
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the first location information of the second access network device sent by the second access network device is received.
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • the processor is further configured to read the computer program in the memory and perform the following operations:
  • a receiving array combining vector is determined.
  • the first data relationship is:
  • v n (t) represents the combined vector of the receiving array
  • I represents the identity matrix, represents the noise variance
  • s n, 1 (t) represents the received signal of the reference antenna of the target terminal
  • sn ,1 (t) [sn ,1,1 (t),...,sn ,1,k (t)...,sn ,1,K0 (t)] T ,k denotes The first sequence number of the second access network device, and the value range of k is 1 to K0; n represents the second sequence number of the target terminal;
  • an embodiment of the present disclosure further provides a signal transmission device, the device comprising:
  • a location acquisition module configured to acquire the first location information of the second access network device and acquire the second location information of the target terminal
  • a coefficient determination module configured to determine a precoding coefficient for performing precoding processing on the data sent to the target terminal according to the first position information and the second position information.
  • an embodiment of the present disclosure further provides a signal transmission device, the device comprising:
  • a precoding determination module configured to determine a precoding coefficient for performing precoding processing on the data sent to the target terminal; wherein the precoding coefficient is the second access network device or the first access network device according to the determined by the first location information of the second access network device and the second location information of the target terminal;
  • a precoding processing module configured to perform precoding processing on the data sent to the target terminal according to the precoding coefficients.
  • an embodiment of the present disclosure further provides a signal transmission device, the device comprising:
  • an information acquisition module configured to acquire the first location information of the second access network device and acquire the second location information of the target terminal
  • a vector determination module configured to determine the first position information and the second position information, and determine the receiving array combining vector corresponding to the precoding coefficient
  • the precoding coefficient is determined by the second access network device or the first access network device according to the first location information and the second location information.
  • an embodiment of the present disclosure further provides an electronic device, the electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the computer program when the processor executes the computer program. as in the above method.
  • an embodiment of the present disclosure further provides a processor-readable storage medium, where a computer program is stored on the processor-readable storage medium, and when the computer program is executed by a processor, the steps in the above method are implemented.
  • the first access network device acquires the first location information of the second access network device and acquires the second location information of the target terminal; according to the first location information and the second location information, determining a precoding coefficient for precoding the data sent to the target terminal, so that the first access network device or the second access network device precodes the downlink data sent to the target terminal according to the precoding coefficient processing to remove co-channel interference.
  • the process of determining the precoding coefficient is simple, which is easy to implement, and can reduce the implementation complexity of massive MIMO.
  • FIG. 1 is one of the flowcharts of a signal transmission method provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a first example provided by an embodiment of the present disclosure
  • FIG. 3 is the second flowchart of the signal transmission method provided by the embodiment of the present disclosure.
  • FIG. 4 is the third flowchart of the signal transmission method provided by the embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a second example provided by an embodiment of the present disclosure.
  • FIG. 6 is one of structural block diagrams of a signal transmission processing apparatus provided by an embodiment of the present disclosure.
  • FIG. 7 is the second structural block diagram of a signal transmission processing apparatus provided by an embodiment of the present disclosure.
  • FIG. 8 is a third structural block diagram of a signal transmission processing apparatus provided by an embodiment of the present disclosure.
  • FIG. 9 is one of the structural block diagrams of an access network device provided by an embodiment of the present disclosure.
  • FIG. 10 is the second structural block diagram of an access network device provided by an embodiment of the present disclosure.
  • FIG. 11 is a structural block diagram of a terminal provided by an embodiment of the present disclosure.
  • Figure 12 schematically shows a block diagram of a computing processing device for performing methods according to the present disclosure.
  • Figure 13 schematically shows a storage unit for holding or carrying program code implementing the method according to the present disclosure.
  • the term "and/or" describes the association relationship of associated objects, and indicates that there can be three kinds of relationships. For example, A and/or B can indicate that A exists alone, A and B exist at the same time, and B exists alone these three situations.
  • the character “/” generally indicates that the associated objects are an "or" relationship.
  • the term “plurality” refers to two or more than two, and other quantifiers are similar.
  • Embodiments of the present disclosure provide a signal transmission method and apparatus, a terminal, and an access network device, so as to reduce the implementation complexity of massive MIMO.
  • the method and the device are conceived based on the same application. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated here.
  • the technical solutions provided by the embodiments of the present disclosure may be applicable to various systems, especially the 5th Generation Mobile Communication Technology (5G), the 6th Generation Mobile Communication Technology (6G) .
  • the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) general packet Wireless service (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, Long term evolution advanced (LTE-A) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA wideband Code Division Multiple Access
  • general packet Wireless service general packet Radio service
  • GPRS
  • the terminal device involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem.
  • the name of the terminal device may be different.
  • the terminal device may be called user equipment (User Equipment, UE).
  • Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN).
  • RAN Radio Access Network
  • "telephone) and computers with mobile terminal equipment eg portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network.
  • Wireless terminal equipment may also be referred to as system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in the embodiments of the present disclosure.
  • the network device involved in the embodiments of the present disclosure may be a base station, and the base station may include a plurality of cells providing services for the terminal.
  • the base station may also be called an access point, or may be a device in the access network that communicates with wireless terminal equipment through one or more sectors on the air interface, or other names.
  • the network device can be used to exchange received air frames with Internet Protocol (IP) packets, and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet. Protocol (IP) communication network.
  • IP Internet Protocol
  • the network devices may also coordinate attribute management for the air interface.
  • the network device involved in the embodiments of the present disclosure may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA). ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a long term evolution (LTE) system (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in 5G network architecture (next generation system), or Home evolved Node B (HeNB), relay node (relay node) , a home base station (femto), a pico base station (pico), etc., which are not limited in the embodiments of the present disclosure.
  • a network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.
  • MIMO transmission can be single-user MIMO (Single User MIMO, SU-MIMO) or multi-user MIMO. (Multiple User MIMO, MU-MIMO). According to the form and number of root antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission.
  • FIG. 1 shows a schematic flowchart of a signal transmission method provided by an embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a signal transmission method, which can be applied to a first access network device, where the first access network device may be a CPU or a centralized unit (Centralized Unit, CU); the present disclosure
  • the first access network device may be a CPU or a centralized unit (Centralized Unit, CU); the present disclosure
  • the second access network device is correspondingly an AP; if the first access network device is a CU, then the second access network device is a distributed unit ( Distributed Unit, DU).
  • Distributed Unit Distributed Unit
  • the method includes:
  • Step 101 Acquire first location information of a second access network device and acquire second location information of a target terminal.
  • the second access network device may be an AP or a DU; as a first example, with reference to FIG. 2, FIG. 2 takes the method applied to the CPU as an example, and FIG. 2 includes the CPU, multiple UEs (User1 to UserK0) and Multiple APs (AP1 to APM); Cell-free massive MIMO combines traditional concepts such as massive MIMO, Small Cell, and user-centric Joint Transmission Coordinated MultiPoint (JT-CoMP); Deploy a large number of access points (Access Point, AP, that is, small base station) within the coverage area to reduce path loss; all APs jointly serve all UEs for the purpose of removing interference; all APs are connected to a central processing unit Unit (Central Processing Unit, CPU), the CPU gives the precoding strategy of the network.
  • Central Processing Unit Central Processing Unit
  • the first access network device acquires first location information of the second access network device and acquires second location information of the target terminal, the first location information indicates the first location of the second access network device, and the second location information indicates the first location of the second access network device. Indicates the second location of the target terminal.
  • Step 102 Determine a precoding coefficient for performing precoding processing on the data sent to the target terminal according to the first location information and the second location information.
  • the first access network device After determining the first location information and the second location information, the first access network device determines a precoding coefficient according to a preset calculation rule or method; the precoding coefficient is sent by the second access network device to the target UE
  • the precoding coefficient used for precoding the downlink data specifically, traditional precoding refers to using channel state information (Channel Sate Information, CSI) to preprocess the transmitted signal to improve system capacity and reduce bit error rate technology.
  • CSI Channel Sate Information
  • the access network equipment uses the same frequency and the same time slot to communicate with multiple terminal users, so co-channel interference will occur. At this time, it is difficult for the terminal to take effective measures to eliminate the influence of the interference, so the access network equipment needs to adopt a certain technology to eliminate the co-channel interference, that is, the precoding technology.
  • the first access network device acquires the first location information of the second access network device and acquires the second location information of the target terminal; according to the first location information and the second location information, determine Precoding coefficients for performing precoding processing on the data sent to the target terminal, so that the first access network device or the second access network device performs precoding processing on the downlink data sent to the target terminal according to the precoding coefficients , to eliminate co-channel interference.
  • the determination process of the precoding coefficient is simple and easy to implement, and the implementation complexity of massive MIMO can be reduced; the embodiment of the present disclosure solves the problem of high complexity of the precoding strategy in the prior art.
  • the method includes:
  • the CU when the first access network device is a CU, the CU performs precoding processing on the data sent to the target terminal according to the precoding coefficient; when the first access network device is a CPU In the case of , the CPU sends the precoding coefficient to the second access network device, so that the second access network device performs precoding processing on the data sent to the target terminal.
  • the acquiring the first location information of the second access network device includes:
  • the first location information includes coordinate information of the antenna of the second access network device.
  • Described precoding coefficient is the precoding coefficient corresponding to each transmit antenna; For example, CPU calculates each transmit antenna of this AP according to the first position information information of all antennas of AP and the second position information of target UE The precoding coefficient is sent to the corresponding AP, so that the signals of all transmit antennas of the AP are focused on the second position information of the target UE.
  • the first access network device When the first access network device obtains the first location information of the second access network device, it can receive the first location information actively sent by the second access network device, for example, the AP broadcasts the location information of each of its transmit antennas to the CPU. It can also be that the first access network device queries the preset location information record, the first location information of the second access network device, for example, the AP registers the geographic locations of all its antennas with the CPU through the fronthaul, and the CPU records the location of each transmitting antenna. The first location information is recorded in the preset location information record, which is convenient for subsequent inquiries.
  • the acquiring the second location information of the target terminal includes:
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • location perception refers to actively determining the device to be located during the positioning process, for example, the first access network device actively sends a perception signal to the target terminal, and determines the target terminal according to the feedback of the target terminal on the perception signal. the second location information.
  • the first access network device may also receive the second location information reported by the target terminal in real time.
  • the second location information includes coordinate information of the reference antenna of the target terminal; for example, the reference antenna is an antenna at the center of all receiving antennas.
  • the determining, according to the first location information and the second location information, precoding coefficients for performing precoding processing on the data sent to the target terminal includes:
  • the phase shift is the product of the wavenumber and the first distance.
  • d m, k represents the first distance
  • k represents the kth receiving antenna of the target terminal
  • m represents the mth AP
  • the magnitude is inversely proportional to the first distance, for example, Among them, A represents the amplitude, and C 0 is a preset constant.
  • the AP may perform power allocation after considering the QoS of all target UEs, such as normalizing the number of target users.
  • the phase shift is the product of the wave number and the first distance, and the wave number is the number of wave cycles per unit length of the transmitted signal in the direction of wave propagation. represents the wave number, where ⁇ represents the wavelength of the transmitted signal, which is a predicted value; then where P represents the phase shift.
  • the first access network device acquires the first location information of the second access network device and acquires the second location information of the target terminal; according to the first location information and the second location information, determine Precoding coefficients for performing precoding processing on the data sent to the target terminal, so that the first access network device or the second access network device performs precoding processing on the downlink data sent to the target terminal according to the precoding coefficients , to eliminate co-channel interference.
  • the process of determining the precoding coefficient is simple and easy to implement.
  • an embodiment of the present disclosure further provides a signal transmission method, which can be applied to a second access network device.
  • the second access network device is an AP.
  • Figure 2 includes a CPU, multiple UEs (User1 to UserK0), and multiple APs (AP1 to APM);
  • Cell-free massive MIMO combines massive MIMO, small cells (Small Cell), and user-centric Traditional concepts such as JT-CoMP;
  • APs are deployed in the coverage area to reduce path loss; all APs jointly serve all UEs for the purpose of removing interference; all APs are connected to a CPU, and the CPU gives the precoding of the network Strategy.
  • the performance of Cell-free massive MIMO due to the cooperation between APs, all APs serve all UEs, which is significantly improved compared to no cooperation or only cell edge UE cooperation to solve the interference problem.
  • the method includes:
  • Step 301 Determine a precoding coefficient for performing precoding processing on the data sent to the target terminal; wherein, the precoding coefficient is the second access network device or the first access network device according to the second access network device.
  • the first location information of the network device and the second location information of the target terminal are determined.
  • the precoding coefficient is the precoding coefficient used for precoding the downlink data when the second access network device sends the downlink data to the target UE; in the embodiment of the present disclosure, the precoding coefficient is the The second access network device or the first access network device is determined according to the first location information of the second access network device and the second location information of the target terminal. For example, after obtaining the second location information of the target UE, the second access network device determines the precoding coefficient according to the first location information and the second location information; or, the first access network device (for example, the CPU) determines the precoding coefficient according to the first location information and after the second location information determines the precoding coefficient, the precoding coefficient is sent to the second access network device.
  • the first access network device for example, the CPU
  • Step 302 Perform precoding processing on the data sent to the target terminal according to the precoding coefficient.
  • the second access network device After the second access network device determines the precoding coefficient, it performs precoding processing on the downlink data sent to the target UE to eliminate co-channel interference; capacity, technology to reduce bit error rate.
  • the access network equipment uses the same frequency and the same time slot to communicate with multiple terminal users, so co-channel interference will occur. At this time, it is difficult for the terminal to take effective measures to eliminate the influence of the interference, so the access network equipment needs to adopt a certain technology to eliminate the co-channel interference, that is, precoding processing.
  • Described precoding coefficient is the precoding coefficient corresponding to each transmit antenna; For example, according to the first position information of all antennas of AP and the second position information of target UE, calculate the value of each transmit antenna of this AP The precoding coefficients make the signals of all transmit antennas of the AP focus on the second location information of the target UE.
  • a precoding coefficient for precoding data sent to the target terminal is determined; and the data sent to the target terminal is subjected to precoding processing according to the precoding coefficient to eliminate co-channel interference .
  • the process of determining the precoding coefficient is simple, which is easy to implement, and can reduce the implementation complexity of massive MIMO.
  • the determining of a precoding coefficient for performing precoding processing on data sent to the target terminal includes:
  • the first access network device for example, a CPU
  • the second access network device determines the precoding coefficient according to the first location information and the second location information.
  • the acquiring the first location information of the second access network device includes:
  • the first location information of the second access network device may be pre-recorded in the location information by the first access network device recorded, and sent to the second access network device.
  • the AP registers the geographic locations of all its antennas with the CPU in advance through the fronthaul, and the CPU records the first location information of each transmit antenna in the preset location information record, which is convenient for subsequent query and use.
  • the first location information of the second access network device is measured, and the second access network device may also actively measure the location information.
  • the acquiring the second location information of the target terminal includes:
  • the target UE can actively send the second location information to the second access network device; or the first access network device obtains the target terminal After the location information is obtained, the first location information is forwarded to the second access network device.
  • the second location information is determined by means of location awareness; location awareness refers to actively determining the device to be located during the positioning process, for example, the second access network device actively sends a perception signal to the target terminal, and according to the target terminal
  • the feedback of the sensing signal is used to determine the second location information of the target terminal.
  • the specific method of location perception is, for example, the wavenumber domain synthetic aperture radar (Synthetic Aperture Radar, SAR) imaging method; in the perception process, when the reflection path needs to be processed, the electric field transmitted by the AP and the reflector received by the AP are reflected back. The electric field of the reflector can be estimated, and then the position coordinates of the reflector can be estimated.
  • the determining the precoding coefficient according to the first position information and the second position information includes:
  • the precoding coefficient includes the amplitude and the phase shift.
  • d m, k represent the first distance
  • k represents the kth receiving antenna of the target terminal, and is referred to as the first sequence number hereinafter
  • m represents the mth transmitting antenna of the second access network device, which is referred to as the second serial number
  • the magnitude is inversely proportional to the first distance, for example, Among them, A represents the amplitude, and C 0 is a preset constant.
  • the AP may perform power allocation after considering the QoS of all target UEs, such as normalizing the number of target users.
  • the phase shift is the product of the wave number and the first distance, and the wave number is the number of wave cycles per unit length of the transmitted signal in the direction of wave propagation. represents the wave number, where ⁇ represents the wavelength of the transmitted signal, which is a predicted value; then where P represents the phase shift.
  • the method before the receiving the precoding coefficient sent by the first access network device, the method further includes:
  • the second access network device sends the first position information of all its transmit antennas to the first access network device to determine the precoding coefficient of each transmit antenna.
  • the method further includes:
  • the first location information is sent to the target terminal, so that the target UE can determine a receiving array combining vector corresponding to the precoding coefficient, so as to receive the precoded downlink data sent by each second access network device.
  • a precoding coefficient for precoding data sent to the target terminal is determined; and the data sent to the target terminal is subjected to precoding processing according to the precoding coefficient to eliminate co-channel interference .
  • the process of determining the precoding coefficient is simple, which is easy to implement, and can reduce the implementation complexity of massive MIMO.
  • FIG. 2 includes a CPU, multiple UEs (User1 to UserK0), and multiple APs (AP1 to APM);
  • the target terminal is any UE from User1 to UserK0;
  • Cell-free massive MIMO combines traditional concepts such as massive MIMO, small cell (Small Cell), and user-centric JT-CoMP; It is to reduce path loss; all APs jointly serve all UEs, the purpose is to remove interference; all APs are connected to a CPU, and the CPU gives the network precoding strategy.
  • all APs due to the cooperation between APs, all APs serve all UEs, which is significantly improved compared to no cooperation or only cell edge UE cooperation to solve the interference problem.
  • the method includes:
  • Step 401 Acquire first location information of a second access network device and acquire second location information of a target terminal.
  • the second access network device may be an AP or a DU; in a downlink massive MIMO system, each AP has M transmit antennas, where M is a positive integer greater than or equal to 1.
  • Step 402 determining the first position information and the second position information, and determining the receiving array combining vector corresponding to the precoding coefficient
  • the precoding coefficient is determined by the second access network device or the first access network device according to the first location information and the second location information.
  • the precoding coefficient is a precoding coefficient corresponding to each transmit antenna. For example, according to the first location information of all antennas of the AP and the second location information of the target UE, the precoding of each transmit antenna of the AP is calculated. The coding coefficients make the signals of all transmit antennas of the AP focus on the second location information of the target UE.
  • the target UE determines the receiving array combining vector corresponding to the precoding coefficients according to the first position information and the second position information, so as to receive the precoded downlink data and achieve optimal reception of the downlink data.
  • the first location information of the second access network device is acquired and the second location information of the target terminal is acquired; the first location information and the second location information are determined, and the precoding coefficients are determined and
  • the corresponding receiving arrays combine vectors to achieve optimal reception of downlink data.
  • the precoding strategy is simple, easy to implement, and can reduce the implementation complexity of massive MIMO.
  • the acquiring the first location information of the second access network device includes:
  • the first location information of the second access network device sent by the second access network device is received.
  • the target UE receives the second location information sent by the second access network device, and is used to determine the receiving array combining vector.
  • the acquiring the second location information of the target terminal includes:
  • the second location information of the target terminal sent by the first access network device is received; the second location information may be pre-recorded in the location information record by the first access network device and sent to the target UE.
  • the target UE registers the geographic locations of all its antennas with the CPU in advance, and the CPU records the second location information of each transmit antenna in the preset location information record, which is convenient for subsequent query and use.
  • the second position information includes the coordinate information of the reference antenna of the target terminal;
  • the reference antenna may be preset, or the antenna close to the position center of all receiving antennas may be selected as Reference antenna.
  • the determining the first position information and the second position information, and determining the receiving array combining vector corresponding to the precoding coefficient includes:
  • a first distance between the location indicated by the first location information and the location indicated by the second location information is determined; the first distance is the distance between the transmitting antenna and the reference antenna.
  • a received signal matrix between the target terminal and the second access network device is determined; the received signal matrix includes the received signal of each receiving antenna of the UE.
  • a receiving array combining vector is determined.
  • the first data relationship is shown in the following formula 1;
  • v n (t) represents the combined vector of the receiving array
  • I represents the identity matrix
  • the noise variance that is, the noise variance of the transmitted signal
  • s n, 1 (t) represents the received signal of the reference antenna of the target terminal, that is, an element in the received signal matrix
  • sn ,1 (t) [sn ,1,1 (t),...,sn ,1,k (t)...,sn ,1,K0 (t)] T ,k denotes The first sequence number of the second access network device, and the value range of k is 1 to K0; n represents the second sequence number of the target terminal;
  • the second access network device as an AP as an example, in the process of sending downlink data, if K0 APs jointly send single-stream data dn to the nth target UE, and the dn of K0 APs
  • the delay difference to the nth target UE is less than the length of a cyclic prefix (Cyclic Prefix, CP) of Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, OFDM).
  • CP Cyclic Prefix
  • OFDM Orthogonal Frequency Division Multiplexing
  • the set of APs with LOS path, quasi-LOS path or strongest NLOS path is denoted as B n , and the number of elements in B n may be equal to K0.
  • the kth AP is shown as S in Figure 5.
  • the AP can be equivalent to multiple APs with a single transmit antenna.
  • n-th target UE there are M receiving antennas to form a Uniform Linear Array (ULA), where the m-th receiving antenna is shown as m in Figure 5, and the center coordinates of m are (x m , y m , z m ).
  • ULA Uniform Linear Array
  • the distance between the kth AP and the mth receive antenna of the nth target UE is:
  • the first step is to focus the beam formed by K0 APs on the coordinate origin (ie, the origin of the coordinate axis of the xyz coordinate system in Figure 3).
  • the distance between the k-th AP and the coordinate origin is d 1,k
  • the electric field of the k-th AP at the coordinate origin can be obtained as:
  • a 1, k is the amplitude of the precoding coefficient of the kth AP to the data of the nth target UE, which can be a value C 0 is a preset constant, that is, the magnitude of the precoding coefficients is inversely proportional to the distance.
  • the phase shift of the precoding of the data of the target UE which can be a value
  • the CPU scans multiple geographic locations near the perceived geographic location of the target UE, and the target UE feeds back the information on each geographic location.
  • the electric field intensity is the real geographic location of the target UE.
  • the second step is to enable the receiving antenna array of the nth target UE to achieve optimal reception.
  • the signal of the kth AP is s n, m, k (t) ⁇ d n , where:
  • w n, k indicates that K0 APs perform precoding for the nth target UE
  • A [A 1 , . . . , A K ]
  • A represents the received signal matrix; then, the received signals of the M receiving antennas are:
  • xn( t ) [xn ,1 (t),...,xn ,M (t)] T
  • the received signal of the array antenna of the nth target UE is x n (t)
  • K0 APs send d n and signals of other UEs (only the effective signal is considered to be aligned, and the interference signal is not aligned)
  • the received signals of K APs When reaching the origin of the coordinates, it is s n, 1 (t), then the matrix A can be used to connect the receiving array signal with the sending array signal.
  • the receiving array vector of the nth target UE is:
  • the received signal be xn(t), according to Calculate the estimated value of the downlink data, and then obtain the downlink data sent by the AP.
  • the channel reciprocity of TDD is not ideal, such as RF chain asymmetry, etc., interference asymmetry; channel estimation error; and channel state information, Precoding
  • the precoding vector and the receiving array combining vector when determining the precoding vector and the receiving array combining vector, no channel information is required, and only the location information of the AP and the terminal needs to be estimated, so the above problems do not occur.
  • Cell-free massive MIMO also has the problem of inconsistency between time delay and channel change caused by signaling interaction, CPU processing, etc.; and in the embodiment of the present disclosure, there is no need for complex interaction between APs. Channel information, only need to exchange location information, therefore, this problem does not occur.
  • the first location information of the second access network device is acquired and the second location information of the target terminal is acquired; the first location information and the second location information are determined, and the precoding coefficients are determined and
  • the corresponding receiving arrays combine vectors to achieve optimal reception of downlink data.
  • the precoding strategy is simple, easy to implement, and can reduce the implementation complexity of massive MIMO.
  • an embodiment of the present disclosure further provides a signal transmission apparatus, which can be applied to a first access network device, and the first access network device may be a CPU or a CU; in the embodiment of the present disclosure, if the first access network device If the access network device is the CPU, the second access network device is correspondingly the AP; if the first access network device is the CU, the second access network device is correspondingly a distributed unit (Distributed Unit, DU).
  • distributed Unit distributed Unit
  • the device includes:
  • the location acquisition module 601 is configured to acquire the first location information of the second access network device and acquire the second location information of the target terminal.
  • the second access network device may be an AP or a DU; as a first example, with reference to FIG. 2, FIG. 2 takes the method applied to the CPU as an example, and FIG. 2 includes the CPU, multiple UEs (User1 to UserK0) and Multiple APs (AP1 to APM); Cell-free massive MIMO combines traditional concepts such as massive MIMO, Small Cell, and user-centric JT-CoMP; deploys a large number of access points (Access Points) within the coverage area.
  • Point, AP that is, small base station
  • the purpose is to reduce the path loss; all APs jointly serve all UEs, the purpose is to remove interference; all APs are connected to the CPU, and the CPU gives the network precoding strategy.
  • Point, AP that is, small base station
  • all APs jointly serve all UEs, the purpose is to remove interference
  • all APs are connected to the CPU, and the CPU gives the network precoding strategy.
  • the performance of Cell-free massive MIMO due to the cooperation between
  • the first access network device acquires first location information of the second access network device and acquires second location information of the target terminal, the first location information indicates the first location of the second access network device, and the second location information indicates the first location of the second access network device. Indicates the second location of the target terminal.
  • the coefficient determination module 602 is configured to determine, according to the first position information and the second position information, a precoding coefficient for performing precoding processing on the data sent to the target terminal.
  • the first access network device After determining the first location information and the second location information, the first access network device determines a precoding coefficient according to a preset calculation rule or method; the precoding coefficient is sent by the second access network device to the target UE
  • the precoding coefficients used for precoding processing of downlink data specifically, precoding refers to a technology in which CSI preprocesses transmitted signals to increase system capacity and reduce bit error rates.
  • precoding refers to a technology in which CSI preprocesses transmitted signals to increase system capacity and reduce bit error rates.
  • the access network equipment uses the same frequency and the same time slot to communicate with multiple terminal users, so co-channel interference will occur. At this time, it is difficult for the terminal to take effective measures to eliminate the influence of the interference, so the access network equipment needs to adopt a certain technology to eliminate the co-channel interference, that is, the precoding technology.
  • the device includes:
  • a first processing module configured to perform precoding processing on the data sent to the target terminal according to the precoding coefficient
  • a second processing module configured to send the precoding coefficient to the second access network device.
  • the location acquisition module 601 is configured to:
  • the first location information includes coordinate information of the antenna of the second access network device.
  • the location acquisition module 601 is configured to:
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • the coefficient determination module 602 includes:
  • a first determination submodule configured to determine a first distance between the position indicated by the first position information and the position indicated by the second position information
  • the second determination sub-module is configured to determine the amplitude and phase shift of the precoding coefficient according to the first distance; wherein, the amplitude is inversely proportional to the first distance; the phase shift is the difference between the wave number and the The product of the first distance.
  • the location acquisition module 601 acquires the first location information of the second access network device and acquires the second location information of the target terminal; the coefficient determination module 602 obtains the first location information and the second location information according to the first location information and the second location information. , determine the precoding coefficient for precoding the data sent to the target terminal, so that the first access network device or the second access network device precodes the downlink data sent to the target terminal according to the precoding coefficient. Coding process to remove co-channel interference. In the embodiment of the present disclosure, the process of determining the precoding coefficient is simple, which is easy to implement, and can reduce the implementation complexity of massive MIMO.
  • an embodiment of the present disclosure further provides a signal transmission apparatus, which can be applied to a second access network device.
  • the second access network device is an AP.
  • Figure 2 includes a CPU, multiple UEs (User1 to UserK0), and multiple APs (AP1 to APM);
  • Cell-free massive MIMO combines massive MIMO, small cells (Small Cell), and user-centric Traditional concepts such as JT-CoMP;
  • APs are deployed in the coverage area to reduce path loss; all APs jointly serve all UEs for the purpose of removing interference; all APs are connected to a CPU, and the CPU gives the precoding of the network Strategy.
  • all APs serve all UEs, which is significantly improved compared to no cooperation or only cell edge UE cooperation to solve the interference problem.
  • the device includes:
  • a precoding determination module 701 configured to determine a precoding coefficient for performing precoding processing on the data sent to the target terminal; wherein the precoding coefficient is the second access network device or the first access network device according to the The first location information of the second access network device and the second location information of the target terminal are determined.
  • the precoding coefficient is the precoding coefficient used for precoding the downlink data when the second access network device sends the downlink data to the target UE; in the embodiment of the present disclosure, the precoding coefficient is the The second access network device or the first access network device is determined according to the first location information of the second access network device and the second location information of the target terminal. For example, after obtaining the second location information of the target UE, the second access network device determines the precoding coefficient according to the first location information and the second location information; or, the first access network device (for example, the CPU) determines the precoding coefficient according to the first location information and after the second location information determines the precoding coefficient, the precoding coefficient is sent to the second access network device.
  • the first access network device for example, the CPU
  • the precoding processing module 702 is configured to perform precoding processing on the data sent to the target terminal according to the precoding coefficient.
  • the second access network device After the second access network device determines the precoding coefficient, it performs precoding processing on the downlink data sent to the target UE to eliminate co-channel interference; capacity, technology to reduce bit error rate.
  • the access network equipment uses the same frequency and the same time slot to communicate with multiple terminal users, so co-channel interference will occur. At this time, it is difficult for the terminal to take effective measures to eliminate the influence of the interference, so the access network equipment needs to adopt a certain technology to eliminate the co-channel interference, that is, precoding processing.
  • the precoding coefficient is a precoding coefficient corresponding to each transmit antenna; for example, according to the first location information of all antennas of the AP and the second location information of the target UE, calculate the value of each transmit antenna of the AP.
  • the precoding coefficients make the signals of all transmit antennas of the AP focus on the second location information of the target UE.
  • the precoding determination module 701 includes:
  • a coefficient receiving submodule configured to receive the precoding coefficient sent by the first access network device
  • a location acquisition sub-module for acquiring first location information of the second access network device and acquiring second location information of the target terminal; determining the location based on the first location information and the second location information the precoding coefficients.
  • the location acquisition submodule is used for:
  • the location acquisition submodule is used for:
  • the location acquisition submodule is used for:
  • the device further includes:
  • a first sending module configured to send the first location information to the first access network device; wherein the first location information includes coordinate information of an antenna of the second access network device.
  • the device further includes:
  • the second sending module is configured to send the first location information to the target terminal.
  • the precoding determination module 701 determines the precoding coefficients used to perform precoding processing on the data sent to the target terminal; the precoding processing module 702 determines the data sent to the target terminal according to the precoding coefficients Precoding is performed to eliminate co-channel interference.
  • the process of determining the precoding coefficient is simple, which is easy to implement, and can reduce the implementation complexity of massive MIMO.
  • FIG. 8 an embodiment of the present disclosure further provides a signal transmission apparatus, which is applied to a target terminal.
  • FIG. 2 includes a CPU, multiple UEs (User1 to UserK0), and multiple APs (AP1 to APM);
  • the target terminal is any UE from User1 to UserK0;
  • Cell-free massive MIMO combines traditional concepts such as massive MIMO, small cell (Small Cell), and user-centric JT-CoMP; It is to reduce path loss; all APs jointly serve all UEs, the purpose is to remove interference; all APs are connected to a CPU, and the CPU gives the network precoding strategy.
  • all APs due to the cooperation between APs, all APs serve all UEs, which is significantly improved compared to no cooperation or only cell edge UE cooperation to solve the interference problem.
  • the device includes:
  • the information acquisition module 801 is configured to acquire the first location information of the second access network device and acquire the second location information of the target terminal.
  • the second access network device may be an AP or a DU; in a downlink massive MIMO system, each AP has M transmit antennas, where M is a positive integer greater than or equal to 1.
  • a vector determination module 802 configured to determine the first position information and the second position information, and determine a receiving array combining vector corresponding to the precoding coefficient
  • the precoding coefficient is determined by the second access network device or the first access network device according to the first location information and the second location information.
  • the precoding coefficient is a precoding coefficient corresponding to each transmit antenna. For example, according to the first location information of all antennas of the AP and the second location information of the target UE, the precoding of each transmit antenna of the AP is calculated. The coding coefficients make the signals of all transmit antennas of the AP focus on the second location information of the target UE.
  • the target UE determines the receiving array combining vector corresponding to the precoding coefficients according to the first position information and the second position information, so as to receive the precoded downlink data and achieve optimal reception of the downlink data.
  • the information acquisition module 801 includes:
  • the first receiving submodule is configured to receive the first location information of the second access network device sent by the second access network device.
  • the information acquisition module 801 includes
  • a second receiving submodule configured to receive the second location information of the target terminal sent by the first access network device
  • a measurement submodule configured to measure the second location information of the target terminal
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • the vector determination module 802 includes:
  • a distance determination submodule configured to determine a first distance between the position indicated by the first position information and the position indicated by the second position information
  • a matrix determination submodule configured to determine a received signal matrix between the target terminal and the second access network device according to the first distance
  • the vector determination sub-module is configured to determine the receiving array combining vector according to the received signal matrix and the first data relationship.
  • the first data relationship is:
  • v n (t) represents the combined vector of the receiving array
  • I represents the identity matrix, represents the noise variance
  • s n, 1 (t) represents the received signal of the reference antenna of the target terminal
  • sn ,1 (t) [sn ,1,1 (t),...,sn ,1,k (t)...,sn ,1,K0 (t)] T ,k denotes The first sequence number of the second access network device, and the value range of k is 1 to K0; n represents the second sequence number of the target terminal;
  • the information acquisition module 801 acquires the first location information of the second access network device and acquires the second location information of the target terminal; the vector determination module 802 determines the first location information and the second location information The location information is used to determine the receiving array combining vector corresponding to the precoding coefficient, so as to realize the optimal reception of downlink data.
  • the precoding strategy is simple, easy to implement, and can reduce the implementation complexity of massive MIMO.
  • each functional module in each embodiment of the present disclosure may be integrated into one processing module, or each module may exist physically alone, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules.
  • the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may be stored in a processor-readable storage medium.
  • the technical solutions of the present disclosure essentially or the parts that contribute to the prior art, or all or part of the technical solutions can be embodied in the form of software products, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present disclosure.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .
  • an embodiment of the present disclosure further provides an access network device, where the access network device may be a first access network device, and the access network device includes:
  • transceiver 940 for receiving and transmitting data under the control of the processor 910;
  • the processor 910 is configured to read the computer program in the memory 920 and perform the following operations:
  • precoding coefficients for performing precoding processing on the data sent to the target terminal are determined.
  • the processor is further configured to read a computer program in the memory and do the following:
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the first location information includes coordinate information of the antenna of the second access network device.
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the magnitude and phase shift of the precoding coefficients are determined according to the first distance; wherein, the magnitude is inversely proportional to the first distance; and the phase shift is the product of the wavenumber and the first distance.
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors 910 represented by processor 910 and various circuits of memory 920 represented by memory 920 are linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface 930 provides the interface.
  • Transceiver 940 may be a number of elements, including a transmitter and a receiver, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like.
  • the processor 910 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 910 in performing operations.
  • the processor 910 can be a central processor (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Comple9Programmable Logic Device, CPLD), the processor 910 may also adopt a multi-core architecture.
  • CPU central processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • CPLD complex programmable logic device
  • the processor 910 is configured to execute any of the methods provided by the embodiments of the present disclosure according to the obtained executable instructions by invoking the computer program stored in the memory 920 .
  • the processor 910 and the memory 920 may also be arranged physically separately.
  • an embodiment of the present disclosure further provides an access network device, where the access network device may be a second access network device, and the access network device includes:
  • memory 1020 for storing computer programs
  • transceiver 1040 for receiving and transmitting data under the control of the processor 1010;
  • the processor 1010 is configured to read the computer program in the memory 1020 and perform the following operations:
  • the precoding coefficient is the second access network device or the first access network device according to the second access network device
  • the first location information and the second location information of the target terminal are determined
  • Precoding processing is performed on the data sent to the target terminal according to the precoding coefficient.
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the processor before the receiving the precoding coefficient sent by the first access network device, the processor is further configured to read a computer program in the memory and execute it Do the following:
  • the first location information includes coordinate information of the antenna of the second access network device.
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the first location information is sent to the target terminal.
  • the bus architecture may include any number of interconnected buses and bridges, specifically, one or more processors 1010 represented by processor 1010 and various circuits of memory 1020 represented by memory 1020 are linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface 1030 provides the interface.
  • Transceiver 1040 may be multiple elements, ie, including transmitters and receivers, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like.
  • the processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 may store data used by the processor 1010 in performing operations.
  • the processor 1010 may be a central processor (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (Comple10Programmable Logic Device, CPLD), the processor 1010 may also adopt a multi-core architecture.
  • CPU central processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • CPLD complex programmable logic device
  • the processor 1010 is configured to execute any one of the methods provided by the embodiments of the present disclosure according to the obtained executable instructions by invoking the computer program stored in the memory 1020 .
  • the processor 1010 and the memory 1020 may also be arranged physically separately.
  • an embodiment of the present disclosure further provides a terminal, where the terminal may be a target terminal, and the terminal includes:
  • memory 1120 for storing computer programs
  • transceiver 1140 for receiving and transmitting data under the control of the processor 1110;
  • the processor 1110 is configured to read the computer program in the memory 1120 and perform the following operations:
  • the precoding coefficient is determined by the second access network device or the first access network device according to the first location information and the second location information.
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the first location information of the second access network device sent by the second access network device is received.
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • the second location information includes coordinate information of the reference antenna of the target terminal.
  • the processor is further configured to read a computer program in the memory and perform the following operations:
  • a receiving array combining vector is determined.
  • the first data relationship is:
  • v n (t) represents the combined vector of the receiving array
  • I represents the identity matrix, represents the noise variance
  • s n, 1 (t) represents the received signal of the reference antenna of the target terminal
  • sn ,1 (t) [sn ,1,1 (t),...,sn ,1,k (t)...,sn ,1,K0 (t)] T ,k denotes The first sequence number of the second access network device, and the value range of k is 1 to K0; n represents the second sequence number of the target terminal;
  • the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors 1110 represented by processor 1110 and various circuits of memory 1120 represented by memory 1120 are linked together.
  • the bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein.
  • the bus interface 1130 provides the interface.
  • Transceiver 1140 may be a number of elements, including a transmitter and a receiver, that provide means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like.
  • the processor 1110 is responsible for managing the bus architecture and general processing, and the memory 1120 may store data used by the processor 1110 in performing operations.
  • the user interface 1150 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 1110 may be a central processor (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (Complex Programmable Logic Device). , CPLD), the processor 1110 may also adopt a multi-core architecture.
  • CPU central processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • CPLD complex programmable logic device
  • the processor 1110 is configured to execute any one of the methods provided by the embodiments of the present disclosure according to the obtained executable instructions by calling the computer program stored in the memory 1120 .
  • the processor 1110 and the memory 1120 may also be arranged physically separately.
  • Embodiments of the present disclosure also provide a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and the computer program is used to cause the processor to execute the signal transmission method.
  • the processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg, CD, DVD, BD, HVD, etc.), and semiconductor memory (eg, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)), etc.
  • magnetic storage eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage eg, CD, DVD, BD, HVD, etc.
  • semiconductor memory eg, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)
  • embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.
  • processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory result in the manufacture of means comprising the instructions product, the instruction means implements the functions specified in the flow or flow of the flowchart and/or the block or blocks of the block diagram.
  • processor-executable instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process that Execution of the instructions provides steps for implementing the functions specified in the flowchart or blocks and/or the block or blocks of the block diagrams.
  • the device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.
  • Various component embodiments of the present disclosure may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof.
  • a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in a computing processing device according to embodiments of the present disclosure.
  • DSP digital signal processor
  • the present disclosure can also be implemented as apparatus or apparatus programs (eg, computer programs and computer program products) for performing some or all of the methods described herein.
  • Such a program implementing the present disclosure may be stored on a computer-readable medium, or may be in the form of one or more signals. Such signals may be downloaded from Internet sites, or provided on carrier signals, or in any other form.
  • Figure 12 illustrates a computing processing device that can implement methods in accordance with the present disclosure.
  • the computing processing device traditionally includes a processor 1210 and a computer program product or computer readable medium in the form of a memory 1220.
  • the memory 1220 may be electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM.
  • the memory 1220 has storage space 1230 for program code 1231 for performing any of the method steps in the above-described methods.
  • the storage space 1230 for program codes may include various program codes 1231 for implementing various steps in the above methods, respectively. These program codes can be read from or written to one or more computer program products.
  • These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. Such computer program products are typically portable or fixed storage units as described with reference to FIG. 13 .
  • the storage unit may have storage segments, storage spaces, etc. arranged similarly to the memory 1220 in the computing processing device of FIG. 12 .
  • the program code may, for example, be compressed in a suitable form.
  • the storage unit includes computer readable code 1231', ie code readable by a processor such as 1210, for example, which, when executed by a computing processing device, causes the computing processing device to perform any of the methods described above. of the various steps.
  • any reference signs placed between parentheses shall not be construed as limiting the claim.
  • the word “comprising” does not exclude the presence of elements or steps not listed in a claim.
  • the word “a” or “an” preceding an element does not exclude the presence of a plurality of such elements.
  • the present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware.
  • the use of the words first, second, and third, etc. do not denote any order. These words can be interpreted as names.

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Abstract

本公开实施例提供了一种信号传输方法及装置、终端、接入网设备。所述方法包括:获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数,使得第一接入网设备或第二接入网设备根据所述预编码系数对发送至目标终端的下行数据进行预编码处理,以消除共信道干扰。本公开实施例中,预编码系数的确定过程简单,便于实现,可降低massive MIMO的实现复杂度。

Description

信号传输方法及装置、终端、接入网设备
相关申请的交叉引用
本公开要求在2020年12月31日提交中国专利局、申请号为202011634254.0、名称为“信号传输方法及装置、终端、接入网设备”的中国专利申请的优先权,其全部内容通过引用结合在本公开中。
技术领域
本公开涉及移动通信技术领域,尤其涉及一种信号传输方法及装置、终端、接入网设备。
背景技术
在移动通信系统中,在多入多出(Multi-Input Multi-Output,MIMO)场景中,预编码(Precoding)策略的复杂度较高。以无小区大规模天线技术(Cell-free Massive MIMO)为例,Cell-free massive MIMO中,接入点(Access Point,AP,即小基站)获得所有用户终端(User Equipment,UE)的信道状态信息(Channel State Information,CSI)信息,通过前向回传(fronthaul)发送给中央处理单元(Central Processing Unit,CPU),CPU计算得到Precoding策略后,向AP反馈其Precoding策略;然而,fronthaul过程中交互的数据量和CPU的计算量都是巨大的。因此,需要进一步降低Precoding策略的复杂度。
发明内容
本公开实施例提供一种信号传输方法及装置、终端、接入网设备,以解决现有技术中,预编码策略的复杂度较高的问题。
第一方面,本公开实施例提供了一种信号传输方法,所述方法包括:
获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
可选地,在所述确定对发送至所述目标终端的数据进行预编码处理的预编码系数之后,所述方法包括:
根据所述预编码系数,对发送至所述目标终端的数据进行预编码处理;
和/或
将所述预编码系数发送至所述第二接入网设备。
可选地,所述获取第二接入网设备的第一位置信息,包括:
接收所述第二接入网设备发送的第一位置信息;或
查询预设位置信息记录中,所述第二接入网设备的第一位置信息;
其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
可选地,所述获取目标终端的第二位置信息,包括:
通过位置感知方式,确定所述目标终端的第二位置信息;或
接收所述目标终端上报的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
可选地,所述根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数,包括:
确定所述第一位置信息所指示的位置与所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为波数与所述第一距离的乘积。
第二方面,本公开实施例提供了一种信号传输方法,所述方法包括:
确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的;
根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
可选地,所述确定用于对发送至目标终端的数据进行预编码处理的预编码系数,包括:
接收所述第一接入网设备发送的所述预编码系数;
获取所述第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数。
可选地,所述获取所述第二接入网设备的第一位置信息,包括:
接收所述第一接入网设备发送的所述第二接入网设备的第一位置信息;
测量所述第二接入网设备的第一位置信息。
可选地,所述获取所述目标终端的第二位置信息,包括:
接收所述第一接入网设备或所述目标终端发送的所述第二位置信息;
或通过位置感知的方式,确定所述第二位置信息。
可选地,所述根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数,包括:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为预设波数与所述第一距离的乘积。
可选地,在所述接收所述第一接入网设备发送的所述预编码系数之前,所述方法还包括:
向所述第一接入网设备发送所述第一位置信息;其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
可选地,所述方法还包括:
向所述目标终端发送所述第一位置信息。
第三方面,本公开实施例还提供一种信号传输方法,所述方法包括:
获取第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;
确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
可选地,所述获取第二接入网设备的第一位置信息,包括:
接收所述第二接入网设备发送的所述第二接入网设备的第一位置信息。
可选地,所述获取所述目标终端的第二位置信息,包括:
接收所述第一接入网设备发送的所述目标终端的第二位置信息;
测量所述目标终端的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
可选地,所述确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量,包括:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述目标终端与所述第二接入网设备之间的接收信号矩阵;
根据所述接收信号矩阵以及第一数据关系,确定接收阵列合并向量。
可选地,所述第一数据关系为:
Figure PCTCN2021117720-appb-000001
其中,v n(t)表示所述接收阵列合并向量;I表示单位矩阵,
Figure PCTCN2021117720-appb-000002
表示噪声方差;
s n,1(t)表示所述目标终端的参考天线的接收信号;
s n,1(t)=[s n,1,1(t),...,s n,1,k(t)...,s n,1,K0(t)] T,k表示所述第二接入网设备的第一序号,k的取值范围为1至K0;n表示所述目标终端的第二序号;
A表示所述接收信号矩阵,其中第k列为
Figure PCTCN2021117720-appb-000003
d m,k表示所述第一距离,d 1,k=r k;m表示所述目标终端的参考天线的第三序号,m的取值范围为1至M。
第四方面,本公开实施例还提供一种接入网设备,所述接入网设备包括:
存储器,用于存储计算机程序;收发机,用于在所述处理器的控制下收发数据;处理器,用于读取所述存储器中的计算机程序并执行以下操作:
获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
可选地,在所述确定对发送至所述目标终端的数据进行预编码处理的预编码系数之后,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
根据所述预编码系数,对发送至所述目标终端的数据进行预编码处理;
和/或
将所述预编码系数发送至所述第二接入网设备。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第二接入网设备发送的第一位置信息;或
查询预设位置信息记录中,所述第二接入网设备的第一位置信息;
其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
通过位置感知方式,确定所述目标终端的第二位置信息;或
接收所述目标终端上报的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
确定所述第一位置信息所指示的位置与所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为波数与所述第一距离的乘积。
第五方面,本公开实施例还提供一种接入网设备,所述接入网设备包括:
存储器,用于存储计算机程序;收发机,用于在所述处理器的控制下收发数据;处理器,用于读取所述存储器中的计算机程序并执行以下操作:
确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的;
根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以 下操作:
接收所述第一接入网设备发送的所述预编码系数;
获取所述第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第一接入网设备发送的所述第二接入网设备的第一位置信息;
测量所述第二接入网设备的第一位置信息。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第一接入网设备或所述目标终端发送的所述第二位置信息;
或通过位置感知的方式,确定所述第二位置信息。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为预设波数与所述第一距离的乘积。
可选地,在所述接收所述第一接入网设备发送的所述预编码系数之前,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
向所述第一接入网设备发送所述第一位置信息;其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
向所述目标终端发送所述第一位置信息。
第六方面,本公开实施例还提供一种终端,所述终端包括:
存储器,用于存储计算机程序;收发机,用于在所述处理器的控制下收发数据;处理器,用于读取所述存储器中的计算机程序并执行以下操作:
获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第二接入网设备发送的所述第二接入网设备的第一位置信息。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第一接入网设备发送的所述目标终端的第二位置信息;
测量所述目标终端的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
可选地,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述目标终端与所述第二接入网设备之间的接收信号矩阵;
根据所述接收信号矩阵以及第一数据关系,确定接收阵列合并向量。
可选地,所述第一数据关系为:
Figure PCTCN2021117720-appb-000004
其中,v n(t)表示所述接收阵列合并向量;I表示单位矩阵,
Figure PCTCN2021117720-appb-000005
表示噪声方差;
s n,1(t)表示所述目标终端的参考天线的接收信号;
s n,1(t)=[s n,1,1(t),...,s n,1,k(t)...,s n,1,K0(t)] T,k表示所述第二接入网设备的第一序号,k的取值范围为1至K0;n表示所述目标终端的第二序号;
A表示所述接收信号矩阵,其中第k列为
Figure PCTCN2021117720-appb-000006
d m,k表示所述第一距离,d 1,k=r k;m表示所述目标终端的参考天线的第三序号,m的取值范围为1至M。
第七方面,本公开实施例还提供一种信号传输装置,所述装置包括:
位置获取模块,用于获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
系数确定模块,用于根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
第八方面,本公开实施例还提供一种信号传输装置,所述装置包括:
预编码确定模块,用于确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的;
预编码处理模块,用于根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
第九方面,本公开实施例还提供一种信号传输装置,所述装置包括:
信息获取模块,用于获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
向量确定模块,用于确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
第十方面,本公开实施例还提供一种电子设备,该电子设备包括存储器、处理器及存储在存储器上并可在处理器上运行的计算机程序,所述处理器执行所述计算机程序时实现如上述方法中的步骤。
第十一方面,本公开实施例还提供一种处理器可读存储介质,该处理器可读存储介质上存储有计算机程序,所述计算机程序被处理器执行时实现如上方法中的步骤。
在本公开实施例中,第一接入网设备获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数,使得第一接入网设备或第二接入网设备根据所述预编码系数对发送至目标终端的下行数据进行预编码处理,以消除共信道干扰。本公开实施例中,预编码系数的确定过程简单,便于实现,可降低massive MIMO的实现复杂度。
上述说明仅是本公开技术方案的概述,为了能够更清楚了解本公开的技术手段,而可依照说明书的内容予以实施,并且为了让本公开的上述和其它目的、特征和优点能够更明显易懂,以下特举本公开的具体实施方式。
附图说明
为了更清楚地说明本公开实施例或相关技术中的技术方案,下面将对实施例或相关技术描述中所需要使用的附图作一简单地介绍,显而易见地,下面描述中的附图是本公开的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本公开实施例提供的信号传输方法的流程图之一;
图2为本公开实施例提供的第一示例的示意图;
图3为本公开实施例提供的信号传输方法的流程图之二;
图4为本公开实施例提供的信号传输方法的流程图之三;
图5为本公开实施例提供的第二示例的示意图;
图6为本公开实施例提供的信号传输处理装置的结构框图之一;
图7为本公开实施例提供的信号传输处理装置的结构框图之二;
图8为本公开实施例提供的信号传输处理装置的结构框图之三;
图9为本公开实施例提供的接入网设备的结构框图之一;
图10为本公开实施例提供的接入网设备的结构框图之二;
图11为本公开实施例提供的终端的结构框图;
图12示意性地示出了用于执行根据本公开的方法的计算处理设备的框图;并且
图13示意性地示出了用于保持或者携带实现根据本公开的方法的程序代码的存储单元。
具体实施例
为使本公开实施例的目的、技术方案和优点更加清楚,下面将结合本公开实施例中的附图,对本公开实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本公开一部分实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本公开保护的范围。
本公开实施例中术语“和/或”,描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
本公开实施例中术语“多个”是指两个或两个以上,其它量词与之类似。
本公开实施例提供了一种信号传输方法及装置、终端、接入网设备,用以实现降低massive MIMO的实现复杂度。
其中,方法和装置是基于同一申请构思的,由于方法和装置解决问题的原理相似,因此装置和方法的实施可以相互参见,重复之处不再赘述。
此外,本公开实施例提供的技术方案可以适用于多种系统,尤其是第五代通信技术(The 5th Generation Mobile Communication Technology,5G)、第六代通信技术(The 6th Generation Mobile Communication Technology,6G)。例如适用的系统可以是全球移动通讯(global system of mobile communication,GSM)系统、码分多址(code division multiple access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)通用分组无线业务(general packet radio service,GPRS)系统、长期演进(long term evolution,LTE)系统、LTE频分双工(frequency division duplex,FDD)系统、LTE时分双工(time division duplex,TDD)系统、高级长期演进(long term evolution  advanced,LTE-A)系统、通用移动系统(universal mobile telecommunication system,UMTS)、全球互联微波接入(worldwide interoperability for microwave access,WiMAX)系统、5G新空口(New Radio,NR)系统等。这多种系统中均包括终端设备和网络设备。系统中还可以包括核心网部分,例如演进的分组系统(Evolved Packet System,EPS)、5G系统(5GS)等。
本公开实施例涉及的终端设备,可以是指向用户提供语音和/或数据连通性的设备,具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备等。在不同的系统中,终端设备的名称可能也不相同,例如在5G系统中,终端设备可以称为用户设备(User Equipment,UE)。无线终端设备可以经无线接入网(Radio Access Network,RAN)与一个或多个核心网(Core Network,CN)进行通信,无线终端设备可以是移动终端设备,如移动电话(或称为“蜂窝”电话)和具有移动终端设备的计算机,例如,可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置,它们与无线接入网交换语言和/或数据。例如,个人通信业务(Personal Communication Service,PCS)电话、无绳电话、会话发起协议(Session Initiated Protocol,SIP)话机、无线本地环路(Wireless Local Loop,WLL)站、个人数字助理(Personal Digital Assistant,PDA)等设备。无线终端设备也可以称为系统、订户单元(subscriber unit)、订户站(subscriber station),移动站(mobile station)、移动台(mobile)、远程站(remote station)、接入点(access point)、远程终端设备(remote terminal)、接入终端设备(access terminal)、用户终端设备(user terminal)、用户代理(user agent)、用户装置(user device),本公开实施例中并不限定。
本公开实施例涉及的网络设备,可以是基站,该基站可以包括多个为终端提供服务的小区。根据具体应用场合不同,基站又可以称为接入点,或者可以是接入网中在空中接口上通过一个或多个扇区与无线终端设备通信的设备,或者其它名称。网络设备可用于将收到的空中帧与网际协议(Internet Protocol,IP)分组进行相互更换,作为无线终端设备与接入网的其余部分之间的路由器,其中接入网的其余部分可包括网际协议(IP)通信网络。网络设备还可协调对空中接口的属性管理。例如,本公开实施例涉及的网络设备可以是全球移动通信系统(Global System for Mobile communications,GSM)或码分多址接入(Code Division Multiple Access,CDMA)中的网络设备(Base  Transceiver Station,BTS),也可以是带宽码分多址接入(Wide-band Code Division Multiple Access,WCDMA)中的网络设备(NodeB),还可以是长期演进(long term evolution,LTE)系统中的演进型网络设备(evolutional Node B,eNB或e-NodeB)、5G网络架构(next generation system)中的5G基站(gNB),也可以是家庭演进基站(Home evolved Node B,HeNB)、中继节点(relay node)、家庭基站(femto)、微微基站(pico)等,本公开实施例中并不限定。在一些网络结构中,网络设备可以包括集中单元(centralized unit,CU)节点和分布单元(distributed unit,DU)节点,集中单元和分布单元也可以地理上分开布置。
网络设备与终端设备之间可以各自使用一或多根天线进行多输入多输出(Multi Input Multi Output,MIMO)传输,MIMO传输可以是单用户MIMO(Single User MIMO,SU-MIMO)或多用户MIMO(Multiple User MIMO,MU-MIMO)。根据根天线组合的形态和数量,MIMO传输可以是2D-MIMO、3D-MIMO、FD-MIMO或massive-MIMO,也可以是分集传输或预编码传输或波束赋形传输等。
图1示出了本公开实施例提供的一种信号传输方法的流程示意图。
如图1所示,本公开实施例提供一种信号传输方法,可以应用于第一接入网设备,所述第一接入网设备可以是CPU或者集中单元(Centralized Unit,CU);本公开实施例中,若第一接入网设备为CPU,则相应地第二接入网设备为AP;若第一接入网设备为CU,则相应地第二接入网设备为分布式单元(Distributed Unit,DU)。
所述方法包括:
步骤101,获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息。
其中,第二接入网设备可以是AP或DU;作为第一示例,结合图2,图2以所述方法应用于CPU为例,图2中包括CPU、多个UE(User1至UserK0)以及多个AP(AP1至APM);Cell-free massive MIMO合并了massive MIMO、小小区(Small Cell)、以用户为中心的联合传输协调多点(Joint Transmission Coordinated MultiPoint,JT-CoMP)等传统概念;在覆盖范围内布放大量接入点(Access Point,AP,即小基站),目的是减小路损;所有的AP联合服务 所有的UE,目的是去除干扰;所有的AP连接到一个中央处理单元(Central Processing Unit,CPU),CPU给出网络的precoding策略。关于Cell-free massive MIMO的性能,由于AP之间的协作,所有的AP服务所有的UE,相比没有协作或仅对小区边缘UE协作解决干扰问题有明显的提升。
第一接入网设备获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息,第一位置信息中指示第二接入网设备的第一位置,第二位置信息中指示目标终端的第二位置。
步骤102,根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
确定第一位置信息以及所述第二位置信息后,第一接入网设备根据预设的计算规则或方式,确定预编码系数;预编码系数为所述第二接入网设备向目标UE发送下行数据时,对下行数据进行预编码处理所采用的预编码系数;具体地,传统的预编码是指利用信道状态信息(Channel Sate Information,CSI)对发送信号进行预处理来提高系统容量,降低误码率的技术。在多终端的MIMO场景中,接入网设备使用同一频率、同一时隙与多个终端用户通信,因此会产生共信道干扰。此时终端很难采取有效的手段消除干扰的影响,因此需要接入网设备采取一定的技术来消除共信道干扰,即预编码技术。
本公开实施例中,第一接入网设备获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数,使得第一接入网设备或第二接入网设备根据所述预编码系数对发送至目标终端的下行数据进行预编码处理,以消除共信道干扰。本公开实施例中,预编码系数的确定过程简单,便于实现,可降低massive MIMO的实现复杂度;本公开实施例解决了现有技术中,预编码策略的复杂度较高的问题。
在一个可选实施例中,在所述确定对发送至所述目标终端的数据进行预编码处理的预编码系数之后,所述方法包括:
根据所述预编码系数,对发送至所述目标终端的数据进行预编码处理;
和/或
将所述预编码系数发送至所述第二接入网设备。
其中,在所述第一接入网设备为CU的情况下,CU根据所述预编码系数, 对发送至所述目标终端的数据进行预编码处理;在所述第一接入网设备为CPU的情况下,CPU将所述预编码系数发送至所述第二接入网设备,使得第二接入网设备对发送至所述目标终端的数据进行预编码处理。
在一个可选实施例中,所述获取第二接入网设备的第一位置信息,包括:
接收所述第二接入网设备发送的第一位置信息;或
查询预设位置信息记录中,所述第二接入网设备的第一位置信息;
其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
以第二接入网设备为AP为例,在下行massive MIMO系统中,AP的集合为B={1,,B},每个AP有M个发射天线,M为大于或等于1的正整数;所述预编码系数为与每个发射天线对应的预编码系数;比如,CPU根据AP的所有天线的第一位置信息信息和目标UE的第二位置信息,计算出该AP的每一个发射天线的预编码系数,并发送给相应的AP,使得该AP的所有发射天线的信号聚焦于目标UE的第二位置信息。
第一接入网设备获取第二接入网设备的第一位置信息时,可以接收第二接入网设备主动发送的第一位置信息,例如AP向CPU广播其每个发射天线的位置信息.还可以是第一接入网设备查询预设位置信息记录中,第二接入网设备的第一位置信息,比如AP通过fronthaul向CPU登记自己所有天线的地理位置,CPU将每个发射天线的第一位置信息记载在预设位置信息记录中,便于后续查询使用。
在一个可选实施例中,所述获取目标终端的第二位置信息,包括:
通过位置感知方式,确定所述目标终端的第二位置信息;或
接收所述目标终端上报的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
本公开实施例中,位置感知是指在定位过程中,主动确定被定位设备,例如第一接入网设备主动向目标终端发送一感知信号,并根据目标终端对感知信号的反馈,确定目标终端的第二位置信息。此外,第一接入网设备还可接收目标终端实时上报的第二位置信息。
若目标UE包括N个接收天线,则所述第二位置信息包括所述目标终端的参考天线的坐标信息;比如参考天线为所有接收天线中处于中心位置的天线。
在一个可选实施例中,所述根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数,包括:
确定所述第一位置信息所指示的位置与所述第二位置信息所指示的位置之间的第一距离;根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;
所述相移为波数与所述第一距离的乘积。
其中,用d m,k表示所述第一距离,k表示目标终端的第k个接收天线;m表示第m个AP;其中,若某个AP包括L个发送天线,则该AP可等价为L个AP;所述幅度与所述第一距离成反比例关系,例如,
Figure PCTCN2021117720-appb-000007
其中,A表示幅度,C 0为预设常数,对于常数C 0的选择,可以是AP在考虑所有目标UE的QoS后进行功率分配,例如对目标用户数量进行归一化。
所述相移为波数与第一距离的乘积,波数即发射信号在波传播的方向上单位长度内的波周数目,用
Figure PCTCN2021117720-appb-000008
表示波数,其中λ表示发射信号的波长,为预知数值;则
Figure PCTCN2021117720-appb-000009
其中P表示相移。
本公开实施例中,第一接入网设备获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数,使得第一接入网设备或第二接入网设备根据所述预编码系数对发送至目标终端的下行数据进行预编码处理,以消除共信道干扰。本公开实施例中,预编码系数的确定过程简单,便于实现,
参见图3,本公开实施例还提供了一种信号传输方法,可以应用于第二接入网设备,可选地,所述第二接入网设备为AP。结合图2,图2中包括CPU、多个UE(User1至UserK0)以及多个AP(AP1至APM);Cell-free massive MIMO合并了massive MIMO、小小区(Small Cell)、以用户为中心的JT-CoMP等传统概念;在覆盖范围内布放AP,目的是减小路损;所有的AP联合服务所有的UE,目的是去除干扰;所有的AP连接到一个CPU,CPU给出网络的precoding策略。关于Cell-free massive MIMO的性能,由于AP之间的协作, 所有的AP服务所有的UE,相比没有协作或仅对小区边缘UE协作解决干扰问题有明显的提升。
所述方法包括:
步骤301,确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的。
其中,预编码系数为所述第二接入网设备向目标UE发送下行数据时,对下行数据进行预编码处理所采用的预编码系数;本公开实施例中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的。例如,第二接入网设备获得目标UE的第二位置信息之后,根据第一位置信息以及第二位置信息确定预编码系数;或者,第一接入网设备(例如CPU)根据第一位置信息以及第二位置信息确定预编码系数后,向第二接入网设备发送所述预编码系数。
步骤302,根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
第二接入网设备确定预编码系数后,对于发送至目标UE的下行数据进行预编码处理,以消除共信道干扰;具体地,预编码是指处理利用CSI对发送信号进行预处理来提高系统容量,降低误码率的技术。在多终端的MIMO场景中,接入网设备使用同一频率、同一时隙与多个终端用户通信,因此会产生共信道干扰。此时终端很难采取有效的手段消除干扰的影响,因此需要接入网设备采取一定的技术来消除共信道干扰,即预编码处理。
以第二接入网设备为AP为例,在下行massive MIMO系统中,AP的集合为B={1,,B},每个AP有M个发射天线,M为大于或等于1的正整数;所述预编码系数为与每个发射天线对应的预编码系数;比如,根据AP的所有天线的第一位置信息信息和目标UE的第二位置信息,计算出该AP的每一个发射天线的预编码系数,使得该AP的所有发射天线的信号聚焦于目标UE的第二位置信息。
本公开实施例中,确定用于对发送至目标终端的数据进行预编码处理的预编码系数;根据所述预编码系数对发送至所述目标终端的数据进行预编码处理,以消除共信道干扰。本公开实施例中,预编码系数的确定过程简单, 便于实现,可降低massive MIMO的实现复杂度。
在一个可选实施例中,所述确定用于对发送至目标终端的数据进行预编码处理的预编码系数,包括:
接收所述第一接入网设备发送的所述预编码系数;第一接入网设备(例如CPU)根据第一位置信息以及第二位置信息确定预编码系数后,向第二接入网设备发送所述预编码系数。
获取所述第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数。第二接入网设备获得目标UE的第二位置信息之后,根据第一位置信息以及第二位置信息确定预编码系数。
在一个可选实施例中,所述获取所述第二接入网设备的第一位置信息,包括:
接收所述第一接入网设备发送的所述第二接入网设备的第一位置信息;第二接入网设备的第一位置信息,可以是第一接入网设备预先记载在位置信息记录中,并发送给第二接入网设备。比如AP预先通过fronthaul向CPU登记自己所有天线的地理位置,CPU将每个发射天线的第一位置信息记载在预设位置信息记录中,便于后续查询使用。
测量所述第二接入网设备的第一位置信息,第二接入网设备还可以主动测量位置信息。
在一个可选实施例中,所述获取所述目标终端的第二位置信息,包括:
接收所述第一接入网设备或所述目标终端发送的所述第二位置信息;目标UE可以主动向第二接入网设备发送第二位置信息;或第一接入网设备获得目标终端的位置信息之后,向第二接入网设备转发所述第一位置信息。
通过位置感知的方式,确定所述第二位置信息;位置感知是指在定位过程中,主动确定被定位设备,例如第二接入网设备主动向目标终端发送一感知信号,并根据目标终端对感知信号的反馈,确定目标终端的第二位置信息。可选地,位置感知的具体方式例如波数域合成孔径雷达(Synthetic Aperture  Radar,SAR)成像方法;在感知过程中,需要处理反射路径时,根据AP发射的电场和AP接收到的反射物反射回来的电场,可以估算出反射物的电场变化,进而可以估算出反射物的位置坐标。
在一个可选实施例中,所述根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数,包括:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为预设波数与所述第一距离的乘积。
其中,所述预编码系数包括所述幅度以及所述相移。用d m,k表示所述第一距离,k表示目标终端的第k个接收天线,后续简称为第一序号;m表示第二接入网设备的第m个发送天线,后续简称为第二序号;所述幅度与所述第一距离成反比例关系,例如,
Figure PCTCN2021117720-appb-000010
其中,A表示幅度,C 0为预设常数,对于常数C 0的选择,可以是AP在考虑所有目标UE的QoS后进行功率分配,例如对目标用户数量进行归一化。
所述相移为波数与第一距离的乘积,波数即发射信号在波传播的方向上单位长度内的波周数目,用
Figure PCTCN2021117720-appb-000011
表示波数,其中λ表示发射信号的波长,为预知数值;则
Figure PCTCN2021117720-appb-000012
其中P表示相移。
在一个可选实施例中,在所述接收所述第一接入网设备发送的所述预编码系数之前,所述方法还包括:
向所述第一接入网设备发送所述第一位置信息;其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息,第二接入网设备可能有多个发射天线,第二接入网设备向第一接入网设备发送其所有发射天线的第一位置信息,以确定每个发射天线的预编码系数。
在一个可选实施例中,所述方法还包括:
向所述目标终端发送所述第一位置信息,以便于目标UE确定与预编码系数对应的接收阵列合并向量,以接收每个第二接入网设备发送的经过预编码处理的下行数据。
本公开实施例中,确定用于对发送至目标终端的数据进行预编码处理的预编码系数;根据所述预编码系数对发送至所述目标终端的数据进行预编码处理,以消除共信道干扰。本公开实施例中,预编码系数的确定过程简单,便于实现,可降低massive MIMO的实现复杂度。
参见图4,本公开实施例提供了一种信号传输方法,可以应用于目标终端,结合图2,图2中包括CPU、多个UE(User1至UserK0)以及多个AP(AP1至APM);目标终端为User1至UserK0中的任一UE;Cell-free massive MIMO合并了massive MIMO、小小区(Small Cell)、以用户为中心的JT-CoMP等传统概念;在覆盖范围内布放AP,目的是减小路损;所有的AP联合服务所有的UE,目的是去除干扰;所有的AP连接到一个CPU,CPU给出网络的precoding策略。关于Cell-free massive MIMO的性能,由于AP之间的协作,所有的AP服务所有的UE,相比没有协作或仅对小区边缘UE协作解决干扰问题有明显的提升。
所述方法包括:
步骤401,获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息。
第二接入网设备可以是第二接入网设备可以是AP或DU;在下行massive MIMO系统中,每个AP有M个发射天线,M为大于或等于1的正整数。
步骤402,确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
所述预编码系数为与每个发射天线对应的预编码系数,比如,根据AP的所有天线的第一位置信息信息和目标UE的第二位置信息,计算出该AP的每一个发射天线的预编码系数,使得该AP的所有发射天线的信号聚焦于目标UE的第二位置信息。
目标UE根据第一位置信息以及第二位置信息,确定与预编码系数对应的接收阵列合并向量,以接收经过预编码处理的下行数据,实现下行数据的最佳接收。
本公开实施例中,获取第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量,实现下行数据的最佳接收。本公开实施例中,预编码策略简单,便于实现,可降低massive MIMO的实现复杂度。
在一个可选实施例中,所述获取第二接入网设备的第一位置信息,包括:
接收所述第二接入网设备发送的所述第二接入网设备的第一位置信息。
目标UE接收第二接入网设备发送的第二位置信息,用于确定接收阵列合并向量。
在一个可选实施例中,所述获取所述目标终端的第二位置信息,包括:
接收所述第一接入网设备发送的所述目标终端的第二位置信息;第二位置信息,可以是第一接入网设备预先记载在位置信息记录中,并发送给目标UE的。比如目标UE预先通过向CPU登记自己所有天线的地理位置,CPU将每个发射天线的第二位置信息记载在预设位置信息记录中,便于后续查询使用。
测量所述目标终端的第二位置信息;其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息;参考天线可以预先设定,或者选择接近所有接收天线的位置中心的天线作为参考天线。
在一个可选实施例中,所述确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量,包括:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;第一距离即发射天线与参考天线之间的距离。
根据所述第一距离,确定所述目标终端与所述第二接入网设备之间的接收信号矩阵;接收信号矩阵中包括UE每个接收天线的接收信号。
根据所述接收信号矩阵以及第一数据关系,确定接收阵列合并向量。
在一个可选实施例中,所述第一数据关系如以下公式1所示;
公式1:
Figure PCTCN2021117720-appb-000013
其中,v n(t)表示所述接收阵列合并向量;I表示单位矩阵,
Figure PCTCN2021117720-appb-000014
表示噪声方差,即发射信号的噪声方差;
s n,1(t)表示所述目标终端的参考天线的接收信号,即接收信号矩阵中的元素;
s n,1(t)=[s n,1,1(t),...,s n,1,k(t)...,s n,1,K0(t)] T,k表示所述第二接入网设备的第一序号,k的取值范围为1至K0;n表示所述目标终端的第二序号;
A表示所述接收信号矩阵,其中第k列为
Figure PCTCN2021117720-appb-000015
d m,k表示所述第一距离,d 1,k=r k;m表示所述目标终端的参考天线的第三序号,m的取值范围为1至M。
作为第二示例,以第二接入网设备为AP为例,在下行数据发送的过程中,若K0个AP共同向第n个目标UE发送单流数据d n,且K0个AP的d n到达第n个目标UE的时延差小于正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)的循环前缀(Cyclic Prefix,CP)长度。首先仅考虑视线传输(Line Of Sight,LOS)径,在没有LOS径时考虑准LOS径,即通过可重配智能曲面(Reconfigurable Intelligent Surface,RIS)反射获得的LOS径,如果没有LOS径和准LOS径,那么考虑最强的一条非线传输(None Line Of Sight,NLOS)径。
对第n个目标UE来说,存在LOS径、准LOS径或最强NLOS径的AP的集合表示为B n,B n中元素个数可以等于K0。其中第k个AP如图5中的S,对于有多个发射天线的AP,该AP可以等效为多个有单个发射天线的AP。
对于第n个目标UE,有M个接收天线,形成均匀线性阵列(Uniform Linear  Array,ULA),其中第m个接收天线如图5中m所示,m中心坐标为(x m,y m,z m)。
因此,第k个AP与第n个目标UE的第m个接收天线之间的距离为:
Figure PCTCN2021117720-appb-000016
第一步,让K0个AP形成的波束聚焦于坐标原点(即图3中xyz坐标系的坐标轴原点)。
第k个AP与坐标原点的距离为d 1,k,可以得到第k个AP在坐标原点的电场为:
Figure PCTCN2021117720-appb-000017
其中,a 1,k为第k个AP对第n个目标UE的数据的预编码系数的幅度,可以取值
Figure PCTCN2021117720-appb-000018
C 0是预设常数,即预编码系数的幅度和距离成反比。
因此,AP和UE离的越远,则AP发给该UE的信号功率越小,以避免对AP和这个UE之间的其他UE造成干扰;φ 1,k表示第K0个AP对第n个目标UE的数据的预编码的相移,可以取值
Figure PCTCN2021117720-appb-000019
其中,由于定位精度只能达到厘米(cm)级,需要进行交互式的修正,比如,CPU在感知到的目标UE地理位置附近的多个地理位置上进行扫描,目标UE反馈各个地理位置上的电场强度,强度最大的地理位置,即为目标UE真实的地理位置。
第二步,使第n个目标UE的接收天线阵列实现最佳接收。
在第n个目标UE的第m个接收天线上,第k个AP的信号为 s n,m,k(t)·d n,其中:
Figure PCTCN2021117720-appb-000020
其中,w n,k表示K0个AP为第n个目标UE执行预编码,
Figure PCTCN2021117720-appb-000021
Figure PCTCN2021117720-appb-000022
对处于坐标原点的第n个目标UE的第1个接收天线,d 1,k=r k,所以:
Figure PCTCN2021117720-appb-000023
以此接收天线为参考点,可以得到:
s n,1(t)=[s n,1,1(t),...,s n,1,K(t)] T
A=[A 1,...,A K]
Figure PCTCN2021117720-appb-000024
A表示所述接收信号矩阵;那么,M个接收天线的接收信号为:
x n(t)=[x n,1(t),...,x n,M(t)] T
可以得到:
x n(t)=A·s n,1(t)·d n+e n(t)
即第n个目标UE的阵列天线接收信号为x n(t),K0个AP发送d n和其他UE的信号(仅考虑对准有效信号,干扰信号没有对准),K个AP的接收信号到达坐标原点时为s n,1(t),那么可以用矩阵A,把接收阵列信号和发送阵列信号联系起来。
则有第n个目标UE的接收阵列向量为:
Figure PCTCN2021117720-appb-000025
确定接收阵列向量后,对其进行最小化处理,即使MSE n=0:
Figure PCTCN2021117720-appb-000026
可以求得,
Figure PCTCN2021117720-appb-000027
Figure PCTCN2021117720-appb-000028
令接收到的信号为xn(t),根据
Figure PCTCN2021117720-appb-000029
计算得到下行数据的估计值,进而得到AP所发送的下行数据。
此外,现有技术中,Cell-free massive MIMO还存在下述问题:例如TDD的信道互异性是不理想的,比如RF链不对称等、干扰不对称;信道估计误差;以及信道状态信息、Precoding向量、Combining向量的量化误差等问题,而本公开实施例中在确定预编码向量和接收阵列合并向量时,不需要信道信息,只需要估计AP和终端的位置信息,因此不会出现上述问题。
并且,现有技术中,Cell-free massive MIMO还存在信令交互、CPU处理等带来的时延与信道变化之间的不一致问题;而本公开实施例中不需要在AP之间交互复杂的信道信息,只需要交互位置信息,因此,也不会出现该问题。
本公开实施例中,获取第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量,实现下行数据的最佳接收。本公 开实施例中,预编码策略简单,便于实现,可降低massive MIMO的实现复杂度。
以上介绍了本公开实施例提供的信号传输方法,下面将结合附图介绍本公开实施例提供的信号传输装置、接入网设备及终端。
参见图6,本公开实施例还提供了一种信号传输装置,可以应用于第一接入网设备,所述第一接入网设备可以是CPU或者CU;本公开实施例中,若第一接入网设备为CPU,则相应地第二接入网设备为AP;若第一接入网设备为CU,则相应地第二接入网设备为分布式单元(Distributed Unit,DU)。
所述装置包括:
位置获取模块601,用于获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息。
其中,第二接入网设备可以是AP或DU;作为第一示例,结合图2,图2以所述方法应用于CPU为例,图2中包括CPU、多个UE(User1至UserK0)以及多个AP(AP1至APM);Cell-free massive MIMO合并了massive MIMO、小小区(Small Cell)、以用户为中心的JT-CoMP等传统概念;在覆盖范围内布放大量接入点(Access Point,AP,即小基站),目的是减小路损;所有的AP联合服务所有的UE,目的是去除干扰;所有的AP连接到CPU,CPU给出网络的precoding策略。关于Cell-free massive MIMO的性能,由于AP之间的协作,所有的AP服务所有的UE,相比没有协作或仅对小区边缘UE协作解决干扰问题有明显的提升。
第一接入网设备获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息,第一位置信息中指示第二接入网设备的第一位置,第二位置信息中指示目标终端的第二位置。
系数确定模块602,用于根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
确定第一位置信息以及所述第二位置信息后,第一接入网设备根据预设的计算规则或方式,确定预编码系数;预编码系数为所述第二接入网设备向目标UE发送下行数据时,对下行数据进行预编码处理所采用的预编码系数;具体地,预编码是指CSI对发送信号进行预处理来提高系统容量,降低误码率的技术。在多终端的MIMO场景中,接入网设备使用同一频率、同一时隙 与多个终端用户通信,因此会产生共信道干扰。此时终端很难采取有效的手段消除干扰的影响,因此需要接入网设备采取一定的技术来消除共信道干扰,即预编码技术。
可选地,本公开实施例中,所述装置包括:
第一处理模块,用于根据所述预编码系数,对发送至所述目标终端的数据进行预编码处理;
和/或
第二处理模块,用于将所述预编码系数发送至所述第二接入网设备。
可选地,本公开实施例中,所述位置获取模块601用于:
接收所述第二接入网设备发送的第一位置信息;或
查询预设位置信息记录中,所述第二接入网设备的第一位置信息;
其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
可选地,本公开实施例中,所述位置获取模块601用于:
通过位置感知方式,确定所述目标终端的第二位置信息;或
接收所述目标终端上报的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
可选地,本公开实施例中,所述系数确定模块602包括:
第一确定子模块,用于确定所述第一位置信息所指示的位置与所述第二位置信息所指示的位置之间的第一距离;
第二确定子模块,用于根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为波数与所述第一距离的乘积。
本公开实施例中,位置获取模块601获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;系数确定模块602根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数,使得第一接入网设备或第二接入网设备根据所述预编码系数对发送至目标终端的下行数据进行预编码处理,以消除共信道干扰。本公开实施例中,预编码系数的确定过程简单,便于实现,可降低massive MIMO的实现复杂度。
参见图7,本公开实施例还提供了一种信号传输装置,可以应用于第二接 入网设备,可选地,所述第二接入网设备为AP。结合图2,图2中包括CPU、多个UE(User1至UserK0)以及多个AP(AP1至APM);Cell-free massive MIMO合并了massive MIMO、小小区(Small Cell)、以用户为中心的JT-CoMP等传统概念;在覆盖范围内布放AP,目的是减小路损;所有的AP联合服务所有的UE,目的是去除干扰;所有的AP连接到一个CPU,CPU给出网络的precoding策略。关于Cell-free massive MIMO的性能,由于AP之间的协作,所有的AP服务所有的UE,相比没有协作或仅对小区边缘UE协作解决干扰问题有明显的提升。
所述装置包括:
预编码确定模块701,用于确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的。
其中,预编码系数为所述第二接入网设备向目标UE发送下行数据时,对下行数据进行预编码处理所采用的预编码系数;本公开实施例中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的。例如,第二接入网设备获得目标UE的第二位置信息之后,根据第一位置信息以及第二位置信息确定预编码系数;或者,第一接入网设备(例如CPU)根据第一位置信息以及第二位置信息确定预编码系数后,向第二接入网设备发送所述预编码系数。
预编码处理模块702,用于根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
第二接入网设备确定预编码系数后,对于发送至目标UE的下行数据进行预编码处理,以消除共信道干扰;具体地,预编码是指处理利用CSI对发送信号进行预处理来提高系统容量,降低误码率的技术。在多终端的MIMO场景中,接入网设备使用同一频率、同一时隙与多个终端用户通信,因此会产生共信道干扰。此时终端很难采取有效的手段消除干扰的影响,因此需要接入网设备采取一定的技术来消除共信道干扰,即预编码处理。
以第二接入网设备为AP为例,在下行massive MIMO系统中,AP的集合为B={1,,B},每个AP有M个发射天线,M为大于或等于1的正整数; 所述预编码系数为与每个发射天线对应的预编码系数;比如,根据AP的所有天线的第一位置信息信息和目标UE的第二位置信息,计算出该AP的每一个发射天线的预编码系数,使得该AP的所有发射天线的信号聚焦于目标UE的第二位置信息。
可选地,本公开实施例中,所述预编码确定模块701包括:
系数接收子模块,用于接收所述第一接入网设备发送的所述预编码系数;
位置获取子模块,用于获取所述第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数。
可选地,本公开实施例中,所述位置获取子模块用于:
接收所述第一接入网设备发送的所述第二接入网设备的第一位置信息;
测量所述第二接入网设备的第一位置信息。
可选地,本公开实施例中,所述位置获取子模块用于:
接收所述第一接入网设备或所述目标终端发送的所述第二位置信息;
或通过位置感知的方式,确定所述第二位置信息。
可选地,本公开实施例中,所述位置获取子模块用于:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为预设波数与所述第一距离的乘积。
可选地,本公开实施例中,所述装置还包括:
第一发送模块,用于向所述第一接入网设备发送所述第一位置信息;其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
可选地,本公开实施例中,所述装置还包括:
第二发送模块,用于向所述目标终端发送所述第一位置信息。
本公开实施例中,预编码确定模块701确定用于对发送至目标终端的数据进行预编码处理的预编码系数;预编码处理模块702根据所述预编码系数 对发送至所述目标终端的数据进行预编码处理,以消除共信道干扰。本公开实施例中,预编码系数的确定过程简单,便于实现,可降低massive MIMO的实现复杂度。
参见图8,本公开实施例还提供了一种信号传输装置,应用于目标终端,结合图2,图2中包括CPU、多个UE(User1至UserK0)以及多个AP(AP1至APM);目标终端为User1至UserK0中的任一UE;Cell-free massive MIMO合并了massive MIMO、小小区(Small Cell)、以用户为中心的JT-CoMP等传统概念;在覆盖范围内布放AP,目的是减小路损;所有的AP联合服务所有的UE,目的是去除干扰;所有的AP连接到一个CPU,CPU给出网络的precoding策略。关于Cell-free massive MIMO的性能,由于AP之间的协作,所有的AP服务所有的UE,相比没有协作或仅对小区边缘UE协作解决干扰问题有明显的提升。
所述装置包括:
信息获取模块801,用于获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息。
第二接入网设备可以是第二接入网设备可以是AP或DU;在下行massive MIMO系统中,每个AP有M个发射天线,M为大于或等于1的正整数。
向量确定模块802,用于确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
所述预编码系数为与每个发射天线对应的预编码系数,比如,根据AP的所有天线的第一位置信息信息和目标UE的第二位置信息,计算出该AP的每一个发射天线的预编码系数,使得该AP的所有发射天线的信号聚焦于目标UE的第二位置信息。
目标UE根据第一位置信息以及第二位置信息,确定与预编码系数对应的接收阵列合并向量,以接收经过预编码处理的下行数据,实现下行数据的最佳接收。
可选地,本公开实施例中,所述信息获取模块801包括:
第一接收子模块,用于接收所述第二接入网设备发送的所述第二接入网 设备的第一位置信息。
可选地,本公开实施例中,所述信息获取模块801包括
第二接收子模块,用于接收所述第一接入网设备发送的所述目标终端的第二位置信息;
测量子模块,用于测量所述目标终端的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
可选地,本公开实施例中,所述向量确定模块802包括:
距离确定子模块,用于确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
矩阵确定子模块,用于根据所述第一距离,确定所述目标终端与所述第二接入网设备之间的接收信号矩阵;
向量确定子模块,用于根据所述接收信号矩阵以及第一数据关系,确定接收阵列合并向量。
可选地,本公开实施例中,所述第一数据关系为:
Figure PCTCN2021117720-appb-000030
其中,v n(t)表示所述接收阵列合并向量;I表示单位矩阵,
Figure PCTCN2021117720-appb-000031
表示噪声方差;
s n,1(t)表示所述目标终端的参考天线的接收信号;
s n,1(t)=[s n,1,1(t),...,s n,1,k(t)...,s n,1,K0(t)] T,k表示所述第二接入网设备的第一序号,k的取值范围为1至K0;n表示所述目标终端的第二序号;
A表示所述接收信号矩阵,其中第k列为
Figure PCTCN2021117720-appb-000032
d m,k表示所述第一距离,d 1,k=r k;m表示所述 目标终端的参考天线的第三序号,m的取值范围为1至M。
本公开实施例中,信息获取模块801获取第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;向量确定模块802确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量,实现下行数据的最佳接收。本公开实施例中,预编码策略简单,便于实现,可降低massive MIMO的实现复杂度。
需要说明的是,本公开实施例中对模块(单元)的划分是示意性的,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式。另外,在本公开各个实施例中的各功能模块可以集成在一个处理模块中,也可以是各个模块单独物理存在,也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现,也可以采用软件功能模块的形式实现。
所述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时,可以存储在一个处理器可读取存储介质中。基于这样的理解,本公开的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)或处理器(processor)执行本公开各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
在此需要说明的是,本公开实施例提供的上述装置,能够实现上述方法实施例所实现的所有方法步骤,且能够达到相同的技术效果,在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
参见图9,本公开实施例还提供了一种接入网设备,所述接入网设备可以为第一接入网设备,所述接入网设备包括:
存储器920、收发机940、处理器910;
存储器920,用于存储计算机程序;
收发机940,用于在处理器910的控制下接收和发送数据;
处理器910,用于读取所述存储器920中的计算机程序并执行以下操作:
获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
可选地,本公开实施例中,在所述确定对发送至所述目标终端的数据进行预编码处理的预编码系数之后,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
根据所述预编码系数,对发送至所述目标终端的数据进行预编码处理;
和/或
将所述预编码系数发送至所述第二接入网设备。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第二接入网设备发送的第一位置信息;或
查询预设位置信息记录中,所述第二接入网设备的第一位置信息;
其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
通过位置感知方式,确定所述目标终端的第二位置信息;或
接收所述目标终端上报的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
确定所述第一位置信息所指示的位置与所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为波数与所述第一距离的乘积。
其中,在图9中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器910代表的一个或多个处理器910和存储器920代表的存储器920的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口930提供接口。收发机940可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置 通信的单元,这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器910负责管理总线架构和通常的处理,存储器920可以存储处理器910在执行操作时所使用的数据。
处理器910可以是中央处埋器(CPU)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)或复杂可编程逻辑器件(Comple9Programmable Logic Device,CPLD),处理器910也可以采用多核架构。
处理器910通过调用存储器920存储的计算机程序,用于按照获得的可执行指令执行本公开实施例提供的任一所述方法。处理器910与存储器920也可以物理上分开布置。
参见图10,本公开实施例还提供了一种接入网设备,所述接入网设备可以为第二接入网设备,所述接入网设备包括:
存储器1020、收发机1040、处理器1010;
存储器1020,用于存储计算机程序;
收发机1040,用于在处理器1010的控制下接收和发送数据;
处理器1010,用于读取所述存储器1020中的计算机程序并执行以下操作:
确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的;
根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第一接入网设备发送的所述预编码系数;
获取所述第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第一接入网设备发送的所述第二接入网设备的第一位置信息;
测量所述第二接入网设备的第一位置信息。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第一接入网设备或所述目标终端发送的所述第二位置信息;
或通过位置感知的方式,确定所述第二位置信息。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为预设波数与所述第一距离的乘积。
可选地,本公开实施例中,在所述接收所述第一接入网设备发送的所述预编码系数之前,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
向所述第一接入网设备发送所述第一位置信息;其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
向所述目标终端发送所述第一位置信息。
其中,在图10中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器1010代表的一个或多个处理器1010和存储器1020代表的存储器1020的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口1030提供接口。收发机1040可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元,这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器1010负责管理总线架构和通常的处理,存储器1020可以存储处理器1010在执行操作时所使用的数据。
处理器1010可以是中央处埋器(CPU)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)或复杂可编程逻辑器件(Comple10Programmable Logic Device,CPLD),处理器1010也可以采用多核架构。
处理器1010通过调用存储器1020存储的计算机程序,用于按照获得的可执行指令执行本公开实施例提供的任一所述方法。处理器1010与存储器1020也可以物理上分开布置。
参见图11,本公开实施例还提供了一种终端,所述终端可以为目标终端,所述终端包括:
存储器1120、收发机1140、处理器1110;
存储器1120,用于存储计算机程序;
收发机1140,用于在处理器1110的控制下接收和发送数据;
处理器1110,用于读取所述存储器1120中的计算机程序并执行以下操作:
获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第二接入网设备发送的所述第二接入网设备的第一位置信息。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
接收所述第一接入网设备发送的所述目标终端的第二位置信息;
测量所述目标终端的第二位置信息;
其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
可选地,本公开实施例中,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位 置之间的第一距离;
根据所述第一距离,确定所述目标终端与所述第二接入网设备之间的接收信号矩阵;
根据所述接收信号矩阵以及第一数据关系,确定接收阵列合并向量。
可选地,本公开实施例中,所述第一数据关系为:
Figure PCTCN2021117720-appb-000033
其中,v n(t)表示所述接收阵列合并向量;I表示单位矩阵,
Figure PCTCN2021117720-appb-000034
表示噪声方差;
s n,1(t)表示所述目标终端的参考天线的接收信号;
s n,1(t)=[s n,1,1(t),...,s n,1,k(t)...,s n,1,K0(t)] T,k表示所述第二接入网设备的第一序号,k的取值范围为1至K0;n表示所述目标终端的第二序号;
A表示所述接收信号矩阵,其中第k列为
Figure PCTCN2021117720-appb-000035
d m,k表示所述第一距离,d 1,k=r k;m表示所述目标终端的参考天线的第三序号,m的取值范围为1至M。
其中,在图11中,总线架构可以包括任意数量的互联的总线和桥,具体由处理器1110代表的一个或多个处理器1110和存储器1120代表的存储器1120的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口1130提供接口。收发机1140可以是多个元件,即包括发送机和接收机,提供用于在传输介质上与各种其他装置通信的单元,这些传输介质包括无线信道、有线信道、光缆等传输介质。处理器1110负责管理总线架构和通常的处理,存储器1120可以存储处理器1110在执行操作时所使用的数据。针对不同的用户设备,用户接口1150 还可以是能够外接内接需要设备的接口,连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器1110可以是中央处埋器(CPU)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现场可编程门阵列(Field-Programmable Gate Array,FPGA)或复杂可编程逻辑器件(Complex Programmable Logic Device,CPLD),处理器1110也可以采用多核架构。
处理器1110通过调用存储器1120存储的计算机程序,用于按照获得的可执行指令执行本公开实施例提供的任一所述方法。处理器1110与存储器1120也可以物理上分开布置。
在此需要说明的是,本公开实施例提供的上述接入网设备、终端以及装置,能够实现上述方法实施例所实现的所有方法步骤,且能够达到相同的技术效果,在此不再对本实施例中与方法实施例相同的部分及有益效果进行具体赘述。
本公开的实施例还提供了一种处理器可读存储介质,所述处理器可读存储介质存储有计算机程序,所述计算机程序用于使所述处理器执行信号传输方法。
所述处理器可读存储介质可以是处理器能够存取的任何可用介质或数据存储设备,包括但不限于磁性存储器(例如软盘、硬盘、磁带、磁光盘(MO)等)、光学存储器(例如CD、DVD、BD、HVD等)、以及半导体存储器(例如ROM、EPROM、EEPROM、非易失性存储器(NAND FLASH)、固态硬盘(SSD))等。
本领域内的技术人员应明白,本公开的实施例可提供为方法、系统、或计算机程序产品。因此,本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本公开是参照根据本公开实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机可执行指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流 程和/或方框的结合。可提供这些计算机可执行指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些处理器可执行指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的处理器可读存储器中,使得存储在该处理器可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些处理器可执行指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所描述的装置实施例仅仅是示意性的,其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下,即可以理解并实施。
本公开的各个部件实施例可以以硬件实现,或者以在一个或者多个处理器上运行的软件模块实现,或者以它们的组合实现。本领域的技术人员应当理解,可以在实践中使用微处理器或者数字信号处理器(DSP)来实现根据本公开实施例的计算处理设备中的一些或者全部部件的一些或者全部功能。本公开还可以实现为用于执行这里所描述的方法的一部分或者全部的设备或者装置程序(例如,计算机程序和计算机程序产品)。这样的实现本公开的程序可以存储在计算机可读介质上,或者可以具有一个或者多个信号的形式。这样的信号可以从因特网网站上下载得到,或者在载体信号上提供,或者以任何其他形式提供。
例如,图12示出了可以实现根据本公开的方法的计算处理设备。该计算处理设备传统上包括处理器1210和以存储器1220形式的计算机程序产品或 者计算机可读介质。存储器1220可以是诸如闪存、EEPROM(电可擦除可编程只读存储器)、EPROM、硬盘或者ROM之类的电子存储器。存储器1220具有用于执行上述方法中的任何方法步骤的程序代码1231的存储空间1230。例如,用于程序代码的存储空间1230可以包括分别用于实现上面的方法中的各种步骤的各个程序代码1231。这些程序代码可以从一个或者多个计算机程序产品中读出或者写入到这一个或者多个计算机程序产品中。这些计算机程序产品包括诸如硬盘,紧致盘(CD)、存储卡或者软盘之类的程序代码载体。这样的计算机程序产品通常为如参考图13所述的便携式或者固定存储单元。该存储单元可以具有与图12的计算处理设备中的存储器1220类似布置的存储段、存储空间等。程序代码可以例如以适当形式进行压缩。通常,存储单元包括计算机可读代码1231’,即可以由例如诸如1210之类的处理器读取的代码,这些代码当由计算处理设备运行时,使该计算处理设备执行上面所描述的方法中的各个步骤。
本文中所称的“一个实施例”、“实施例”或者“一个或者多个实施例”意味着,结合实施例描述的特定特征、结构或者特性包括在本公开的至少一个实施例中。此外,请注意,这里“在一个实施例中”的词语例子不一定全指同一个实施例。
在此处所提供的说明书中,说明了大量具体细节。然而,能够理解,本公开的实施例可以在没有这些具体细节的情况下被实践。在一些实例中,并未详细示出公知的方法、结构和技术,以便不模糊对本说明书的理解。
在权利要求中,不应将位于括号之间的任何参考符号构造成对权利要求的限制。单词“包含”不排除存在未列在权利要求中的元件或步骤。位于元件之前的单词“一”或“一个”不排除存在多个这样的元件。本公开可以借助于包括有若干不同元件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中,这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。
最后应说明的是:以上实施例仅用以说明本公开的技术方案,而非对其限制;尽管参照前述实施例对本公开进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或 者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本公开各实施例技术方案的精神和范围。

Claims (39)

  1. 一种信号传输方法,其特征在于,所述方法包括:
    获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
    根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
  2. 根据权利要求1所述的信号传输方法,其特征在于,在所述确定对发送至所述目标终端的数据进行预编码处理的预编码系数之后,所述方法包括:
    根据所述预编码系数,对发送至所述目标终端的数据进行预编码处理;
    和/或
    将所述预编码系数发送至所述第二接入网设备。
  3. 根据权利要求1所述的信号传输方法,其特征在于,所述获取第二接入网设备的第一位置信息,包括:
    接收所述第二接入网设备发送的第一位置信息;或
    查询预设位置信息记录中,所述第二接入网设备的第一位置信息;
    其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
  4. 根据权利要求1所述的信号传输方法,其特征在于,所述获取目标终端的第二位置信息,包括:
    通过位置感知方式,确定所述目标终端的第二位置信息;或
    接收所述目标终端上报的第二位置信息;
    其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
  5. 根据权利要求1所述的信号传输方法,其特征在于,所述根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数,包括:
    确定所述第一位置信息所指示的位置与所述第二位置信息所指示的位置之间的第一距离;
    根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为波数与所述第一距离的乘积。
  6. 一种信号传输方法,其特征在于,所述方法包括:
    确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设 备的第一位置信息以及所述目标终端的第二位置信息确定的;
    根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
  7. 根据权利要求6所述的信号传输方法,其特征在于,所述确定用于对发送至目标终端的数据进行预编码处理的预编码系数,包括:
    接收所述第一接入网设备发送的所述预编码系数;
    获取所述第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数。
  8. 根据权利要求7所述的信号传输方法,其特征在于,所述获取所述第二接入网设备的第一位置信息,包括:
    接收所述第一接入网设备发送的所述第二接入网设备的第一位置信息;
    测量所述第二接入网设备的第一位置信息。
  9. 根据权利要求7所述的信号传输方法,其特征在于,所述获取所述目标终端的第二位置信息,包括:
    接收所述第一接入网设备或所述目标终端发送的所述第二位置信息;
    或通过位置感知的方式,确定所述第二位置信息。
  10. 根据权利要求7所述的信号传输方法,其特征在于,所述根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数,包括:
    确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
    根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为预设波数与所述第一距离的乘积。
  11. 根据权利要求7所述的信号传输方法,其特征在于,在所述接收所述第一接入网设备发送的所述预编码系数之前,所述方法还包括:
    向所述第一接入网设备发送所述第一位置信息;其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
  12. 根据权利要求6所述的信号传输方法,其特征在于,所述方法还包 括:
    向所述目标终端发送所述第一位置信息。
  13. 一种信号传输方法,其特征在于,所述方法包括:
    获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
    确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
    其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
  14. 根据权利要求13所述的信号传输方法,其特征在于,所述获取第二接入网设备的第一位置信息,包括:
    接收所述第二接入网设备发送的所述第二接入网设备的第一位置信息。
  15. 根据权利要求13所述的信号传输方法,其特征在于,所述获取所述目标终端的第二位置信息,包括:
    接收所述第一接入网设备发送的所述目标终端的第二位置信息;
    测量所述目标终端的第二位置信息;
    其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
  16. 根据权利要求13所述的信号传输方法,其特征在于,所述确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量,包括:
    确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
    根据所述第一距离,确定所述目标终端与所述第二接入网设备之间的接收信号矩阵;
    根据所述接收信号矩阵以及第一数据关系,确定接收阵列合并向量。
  17. 根据权利要求16所述的信号传输方法,其特征在于,所述第一数据关系为:
    Figure PCTCN2021117720-appb-100001
    其中,v n(t)表示所述接收阵列合并向量;I表示单位矩阵,
    Figure PCTCN2021117720-appb-100002
    表示噪声方 差;
    s n,1(t)表示所述目标终端的参考天线的接收信号;
    s n,1(t)=[s n,1,1(t),…,s n,1,k(t)…,s n,1,K0(t)] T,k表示所述第二接入网设备的第一序号,k的取值范围为1至K0;n表示所述目标终端的第二序号;
    A表示所述接收信号矩阵,其中第k列为
    Figure PCTCN2021117720-appb-100003
    d m,k表示所述第一距离,d 1,k=r k;m表示所述目标终端的参考天线的第三序号,m的取值范围为1至M。
  18. 一种接入网设备,其特征在于,所述接入网设备包括:存储器,收发机,处理器;
    存储器,用于存储计算机程序;收发机,用于在所述处理器的控制下收发数据;处理器,用于读取所述存储器中的计算机程序并执行以下操作:
    获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
    根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
  19. 根据权利要求18所述的接入网设备,其特征在于,在所述确定对发送至所述目标终端的数据进行预编码处理的预编码系数之后,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    根据所述预编码系数,对发送至所述目标终端的数据进行预编码处理;
    和/或
    将所述预编码系数发送至所述第二接入网设备。
  20. 根据权利要求18所述的接入网设备,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    接收所述第二接入网设备发送的第一位置信息;或
    查询预设位置信息记录中,所述第二接入网设备的第一位置信息;
    其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
  21. 根据权利要求18所述的接入网设备,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    通过位置感知方式,确定所述目标终端的第二位置信息;或
    接收所述目标终端上报的第二位置信息;
    其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
  22. 根据权利要求18所述的接入网设备,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    确定所述第一位置信息所指示的位置与所述第二位置信息所指示的位置之间的第一距离;
    根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为波数与所述第一距离的乘积。
  23. 一种接入网设备,其特征在于,所述接入网设备包括:存储器,收发机,处理器;
    存储器,用于存储计算机程序;收发机,用于在所述处理器的控制下收发数据;处理器,用于读取所述存储器中的计算机程序并执行以下操作:
    确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的;
    根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
  24. 根据权利要求23所述的接入网设备,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    接收所述第一接入网设备发送的所述预编码系数;
    获取所述第二接入网设备的第一位置信息以及获取所述目标终端的第二位置信息;根据所述第一位置信息以及所述第二位置信息,确定所述预编码系数。
  25. 根据权利要求24所述的接入网设备,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    接收所述第一接入网设备发送的所述第二接入网设备的第一位置信息;
    测量所述第二接入网设备的第一位置信息。
  26. 根据权利要求24所述的接入网设备,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    接收所述第一接入网设备或所述目标终端发送的所述第二位置信息;
    或通过位置感知的方式,确定所述第二位置信息。
  27. 根据权利要求24所述的接入网设备,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
    根据所述第一距离,确定所述预编码系数的幅度以及相移;其中,所述幅度与所述第一距离成反比例关系;所述相移为预设波数与所述第一距离的乘积。
  28. 根据权利要求24所述的接入网设备,其特征在于,在所述接收所述第一接入网设备发送的所述预编码系数之前,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    向所述第一接入网设备发送所述第一位置信息;其中,所述第一位置信息包括所述第二接入网设备的天线的坐标信息。
  29. 根据权利要求23所述的接入网设备,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    向所述目标终端发送所述第一位置信息。
  30. 一种终端,其特征在于,所述终端包括:存储器,收发机,处理器;
    存储器,用于存储计算机程序;收发机,用于在所述处理器的控制下收发数据;处理器,用于读取所述存储器中的计算机程序并执行以下操作:
    获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
    确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
    其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
  31. 根据权利要求30所述的终端,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    接收所述第二接入网设备发送的所述第二接入网设备的第一位置信息。
  32. 根据权利要求30所述的终端,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    接收所述第一接入网设备发送的所述目标终端的第二位置信息;
    测量所述目标终端的第二位置信息;
    其中,所述第二位置信息包括所述目标终端的参考天线的坐标信息。
  33. 根据权利要求30所述的终端,其特征在于,所述处理器,还用于读取所述存储器中的计算机程序并执行以下操作:
    确定所述第一位置信息所指示的位置以及所述第二位置信息所指示的位置之间的第一距离;
    根据所述第一距离,确定所述目标终端与所述第二接入网设备之间的接收信号矩阵;
    根据所述接收信号矩阵以及第一数据关系,确定接收阵列合并向量。
  34. 根据权利要求33所述的终端,其特征在于,所述第一数据关系为:
    Figure PCTCN2021117720-appb-100004
    其中,v n(t)表示所述接收阵列合并向量;I表示单位矩阵,
    Figure PCTCN2021117720-appb-100005
    表示噪声方差;
    s n,1(t)表示所述目标终端的参考天线的接收信号;
    s n,1(t)=[s n,1,1(t),…,s n,1,k(t)…,s n,1,K0(t)] T,k表示所述第二接入网设备的第一序号,k的取值范围为1至K0;n表示所述目标终端的第二序号;
    A表示所述接收信号矩阵,其中第k列为
    Figure PCTCN2021117720-appb-100006
    d m,k表示所述第一距离,d 1,k=r k;m表示所述目标终端的参考天线的第三序号,m的取值范围为1至M。
  35. 一种信号传输装置,其特征在于,所述装置包括:
    位置获取模块,用于获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
    系数确定模块,用于根据所述第一位置信息以及所述第二位置信息,确定对发送至所述目标终端的数据进行预编码处理的预编码系数。
  36. 一种信号传输装置,其特征在于,所述装置包括:
    预编码确定模块,用于确定用于对发送至目标终端的数据进行预编码处理的预编码系数;其中,所述预编码系数为第二接入网设备或第一接入网设备根据所述第二接入网设备的第一位置信息以及所述目标终端的第二位置信息确定的;
    预编码处理模块,用于根据所述预编码系数对发送至所述目标终端的数据进行预编码处理。
  37. 一种信号传输装置,其特征在于,所述装置包括:
    信息获取模块,用于获取第二接入网设备的第一位置信息以及获取目标终端的第二位置信息;
    向量确定模块,用于确定所述第一位置信息以及所述第二位置信息,确定与预编码系数对应的接收阵列合并向量;
    其中,所述预编码系数为所述第二接入网设备或第一接入网设备根据所述第一位置信息以及所述第二位置信息确定的。
  38. 一种处理器可读存储介质,其特征在于,所述处理器可读存储介质存储有计算机程序,所述计算机程序用于使所述处理器执行权利要求1至17中任一项所述的方法。
  39. 一种计算机程序,包括计算机可读代码,当所述计算机可读代码在计算处理设备上运行时,使所述计算处理设备执行如权利要求1至17中任一项所述的方法。
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